diff options
Diffstat (limited to 'pjlib-util/src/pjlib-util/http_client.c')
| -rw-r--r-- | pjlib-util/src/pjlib-util/http_client.c | 1654 |
1 files changed, 1654 insertions, 0 deletions
diff --git a/pjlib-util/src/pjlib-util/http_client.c b/pjlib-util/src/pjlib-util/http_client.c new file mode 100644 index 0000000..6053620 --- /dev/null +++ b/pjlib-util/src/pjlib-util/http_client.c @@ -0,0 +1,1654 @@ +/* $Id: http_client.c 3841 2011-10-24 09:28:13Z ming $ */ +/* + * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <pjlib-util/http_client.h> +#include <pj/activesock.h> +#include <pj/assert.h> +#include <pj/ctype.h> +#include <pj/errno.h> +#include <pj/except.h> +#include <pj/pool.h> +#include <pj/string.h> +#include <pj/timer.h> +#include <pj/rand.h> +#include <pjlib-util/base64.h> +#include <pjlib-util/errno.h> +#include <pjlib-util/md5.h> +#include <pjlib-util/scanner.h> +#include <pjlib-util/string.h> + +#define THIS_FILE "http_client.c" + +#if 0 + /* Enable some tracing */ + #define TRACE_(arg) PJ_LOG(3,arg) +#else + #define TRACE_(arg) +#endif + +#define NUM_PROTOCOL 2 +#define HTTP_1_0 "1.0" +#define HTTP_1_1 "1.1" +#define CONTENT_LENGTH "Content-Length" +/* Buffer size for sending/receiving messages. */ +#define BUF_SIZE 2048 +/* Initial data buffer size to store the data in case content- + * length is not specified in the server's response. + */ +#define INITIAL_DATA_BUF_SIZE 2048 +#define INITIAL_POOL_SIZE 1024 +#define POOL_INCREMENT_SIZE 512 + +enum http_protocol +{ + PROTOCOL_HTTP, + PROTOCOL_HTTPS +}; + +static const char *http_protocol_names[NUM_PROTOCOL] = +{ + "HTTP", + "HTTPS" +}; + +static const unsigned int http_default_port[NUM_PROTOCOL] = +{ + 80, + 443 +}; + +enum http_method +{ + HTTP_GET, + HTTP_PUT, + HTTP_DELETE +}; + +static const char *http_method_names[3] = +{ + "GET", + "PUT", + "DELETE" +}; + +enum http_state +{ + IDLE, + CONNECTING, + SENDING_REQUEST, + SENDING_REQUEST_BODY, + REQUEST_SENT, + READING_RESPONSE, + READING_DATA, + READING_COMPLETE, + ABORTING, +}; + +enum auth_state +{ + AUTH_NONE, /* Not authenticating */ + AUTH_RETRYING, /* New request with auth has been submitted */ + AUTH_DONE /* Done retrying the request with auth. */ +}; + +struct pj_http_req +{ + pj_str_t url; /* Request URL */ + pj_http_url hurl; /* Parsed request URL */ + pj_sockaddr addr; /* The host's socket address */ + pj_http_req_param param; /* HTTP request parameters */ + pj_pool_t *pool; /* Pool to allocate memory from */ + pj_timer_heap_t *timer; /* Timer for timeout management */ + pj_ioqueue_t *ioqueue; /* Ioqueue to use */ + pj_http_req_callback cb; /* Callbacks */ + pj_activesock_t *asock; /* Active socket */ + pj_status_t error; /* Error status */ + pj_str_t buffer; /* Buffer to send/receive msgs */ + enum http_state state; /* State of the HTTP request */ + enum auth_state auth_state; /* Authentication state */ + pj_timer_entry timer_entry;/* Timer entry */ + pj_bool_t resolved; /* Whether URL's host is resolved */ + pj_http_resp response; /* HTTP response */ + pj_ioqueue_op_key_t op_key; + struct tcp_state + { + /* Total data sent so far if the data is sent in segments (i.e. + * if on_send_data() is not NULL and if param.reqdata.total_size > 0) + */ + pj_size_t tot_chunk_size; + /* Size of data to be sent (in a single activesock operation).*/ + pj_size_t send_size; + /* Data size sent so far. */ + pj_size_t current_send_size; + /* Total data received so far. */ + pj_size_t current_read_size; + } tcp_state; +}; + +/* Start sending the request */ +static pj_status_t http_req_start_sending(pj_http_req *hreq); +/* Start reading the response */ +static pj_status_t http_req_start_reading(pj_http_req *hreq); +/* End the request */ +static pj_status_t http_req_end_request(pj_http_req *hreq); +/* Parse the header data and populate the header fields with the result. */ +static pj_status_t http_headers_parse(char *hdata, pj_size_t size, + pj_http_headers *headers); +/* Parse the response */ +static pj_status_t http_response_parse(pj_pool_t *pool, + pj_http_resp *response, + void *data, pj_size_t size, + pj_size_t *remainder); +/* Restart the request with authentication */ +static void restart_req_with_auth(pj_http_req *hreq); +/* Parse authentication challenge */ +static pj_status_t parse_auth_chal(pj_pool_t *pool, pj_str_t *input, + pj_http_auth_chal *chal); + +static pj_uint16_t get_http_default_port(const pj_str_t *protocol) +{ + int i; + + for (i = 0; i < NUM_PROTOCOL; i++) { + if (!pj_stricmp2(protocol, http_protocol_names[i])) { + return (pj_uint16_t)http_default_port[i]; + } + } + return 0; +} + +static const char * get_protocol(const pj_str_t *protocol) +{ + int i; + + for (i = 0; i < NUM_PROTOCOL; i++) { + if (!pj_stricmp2(protocol, http_protocol_names[i])) { + return http_protocol_names[i]; + } + } + + /* Should not happen */ + pj_assert(0); + return NULL; +} + + +/* Syntax error handler for parser. */ +static void on_syntax_error(pj_scanner *scanner) +{ + PJ_UNUSED_ARG(scanner); + PJ_THROW(PJ_EINVAL); // syntax error +} + +/* Callback when connection is established to the server */ +static pj_bool_t http_on_connect(pj_activesock_t *asock, + pj_status_t status) +{ + pj_http_req *hreq = (pj_http_req*) pj_activesock_get_user_data(asock); + + if (hreq->state == ABORTING || hreq->state == IDLE) + return PJ_FALSE; + + if (status != PJ_SUCCESS) { + hreq->error = status; + pj_http_req_cancel(hreq, PJ_TRUE); + return PJ_FALSE; + } + + /* OK, we are connected. Start sending the request */ + hreq->state = SENDING_REQUEST; + http_req_start_sending(hreq); + return PJ_TRUE; +} + +static pj_bool_t http_on_data_sent(pj_activesock_t *asock, + pj_ioqueue_op_key_t *op_key, + pj_ssize_t sent) +{ + pj_http_req *hreq = (pj_http_req*) pj_activesock_get_user_data(asock); + + PJ_UNUSED_ARG(op_key); + + if (hreq->state == ABORTING || hreq->state == IDLE) + return PJ_FALSE; + + if (sent <= 0) { + hreq->error = (sent < 0 ? -sent : PJLIB_UTIL_EHTTPLOST); + pj_http_req_cancel(hreq, PJ_TRUE); + return PJ_FALSE; + } + + hreq->tcp_state.current_send_size += sent; + TRACE_((THIS_FILE, "\nData sent: %d out of %d bytes", + hreq->tcp_state.current_send_size, hreq->tcp_state.send_size)); + if (hreq->tcp_state.current_send_size == hreq->tcp_state.send_size) { + /* Find out whether there is a request body to send. */ + if (hreq->param.reqdata.total_size > 0 || + hreq->param.reqdata.size > 0) + { + if (hreq->state == SENDING_REQUEST) { + /* Start sending the request body */ + hreq->state = SENDING_REQUEST_BODY; + hreq->tcp_state.tot_chunk_size = 0; + pj_assert(hreq->param.reqdata.total_size == 0 || + (hreq->param.reqdata.total_size > 0 && + hreq->param.reqdata.size == 0)); + } else { + /* Continue sending the next chunk of the request body */ + hreq->tcp_state.tot_chunk_size += hreq->tcp_state.send_size; + if (hreq->tcp_state.tot_chunk_size == + hreq->param.reqdata.total_size || + hreq->param.reqdata.total_size == 0) + { + /* Finish sending all the chunks, start reading + * the response. + */ + hreq->state = REQUEST_SENT; + http_req_start_reading(hreq); + return PJ_TRUE; + } + } + if (hreq->param.reqdata.total_size > 0 && + hreq->cb.on_send_data) + { + /* Call the callback for the application to provide + * the next chunk of data to be sent. + */ + (*hreq->cb.on_send_data)(hreq, &hreq->param.reqdata.data, + &hreq->param.reqdata.size); + /* Make sure the total data size given by the user does not + * exceed what the user originally said. + */ + pj_assert(hreq->tcp_state.tot_chunk_size + + hreq->param.reqdata.size <= + hreq->param.reqdata.total_size); + } + http_req_start_sending(hreq); + } else { + /* No request body, proceed to reading the server's response. */ + hreq->state = REQUEST_SENT; + http_req_start_reading(hreq); + } + } + return PJ_TRUE; +} + +static pj_bool_t http_on_data_read(pj_activesock_t *asock, + void *data, + pj_size_t size, + pj_status_t status, + pj_size_t *remainder) +{ + pj_http_req *hreq = (pj_http_req*) pj_activesock_get_user_data(asock); + + TRACE_((THIS_FILE, "\nData received: %d bytes", size)); + + if (hreq->state == ABORTING || hreq->state == IDLE) + return PJ_FALSE; + + if (hreq->state == READING_RESPONSE) { + pj_status_t st; + pj_size_t rem; + + if (status != PJ_SUCCESS && status != PJ_EPENDING) { + hreq->error = status; + pj_http_req_cancel(hreq, PJ_TRUE); + return PJ_FALSE; + } + + /* Parse the response. */ + st = http_response_parse(hreq->pool, &hreq->response, + data, size, &rem); + if (st == PJLIB_UTIL_EHTTPINCHDR) { + /* If we already use up all our buffer and still + * hasn't received the whole header, return error + */ + if (size == BUF_SIZE) { + hreq->error = PJ_ETOOBIG; // response header size is too big + pj_http_req_cancel(hreq, PJ_TRUE); + return PJ_FALSE; + } + /* Keep the data if we do not get the whole response header */ + *remainder = size; + } else { + hreq->state = READING_DATA; + if (st != PJ_SUCCESS) { + /* Server replied with an invalid (or unknown) response + * format. We'll just pass the whole (unparsed) response + * to the user. + */ + hreq->response.data = data; + hreq->response.size = size - rem; + } + + /* If code is 401 or 407, find and parse WWW-Authenticate or + * Proxy-Authenticate header + */ + if (hreq->response.status_code == 401 || + hreq->response.status_code == 407) + { + const pj_str_t STR_WWW_AUTH = { "WWW-Authenticate", 16 }; + const pj_str_t STR_PROXY_AUTH = { "Proxy-Authenticate", 18 }; + pj_http_resp *response = &hreq->response; + pj_http_headers *hdrs = &response->headers; + unsigned i; + + status = PJ_ENOTFOUND; + for (i = 0; i < hdrs->count; i++) { + if (!pj_stricmp(&hdrs->header[i].name, &STR_WWW_AUTH) || + !pj_stricmp(&hdrs->header[i].name, &STR_PROXY_AUTH)) + { + status = parse_auth_chal(hreq->pool, + &hdrs->header[i].value, + &response->auth_chal); + break; + } + } + + /* Check if we should perform authentication */ + if (status == PJ_SUCCESS && + hreq->auth_state == AUTH_NONE && + hreq->response.auth_chal.scheme.slen && + hreq->param.auth_cred.username.slen && + (hreq->param.auth_cred.scheme.slen == 0 || + !pj_stricmp(&hreq->response.auth_chal.scheme, + &hreq->param.auth_cred.scheme)) && + (hreq->param.auth_cred.realm.slen == 0 || + !pj_stricmp(&hreq->response.auth_chal.realm, + &hreq->param.auth_cred.realm)) + ) + { + /* Yes, authentication is required and we have been + * configured with credential. + */ + restart_req_with_auth(hreq); + if (hreq->auth_state == AUTH_RETRYING) { + /* We'll be resending the request with auth. This + * connection has been closed. + */ + return PJ_FALSE; + } + } + } + + /* We already received the response header, call the + * appropriate callback. + */ + if (hreq->cb.on_response) + (*hreq->cb.on_response)(hreq, &hreq->response); + hreq->response.data = NULL; + hreq->response.size = 0; + + if (rem > 0 || hreq->response.content_length == 0) + return http_on_data_read(asock, (rem == 0 ? NULL: + (char *)data + size - rem), + rem, PJ_SUCCESS, NULL); + } + + return PJ_TRUE; + } + + if (hreq->state != READING_DATA) + return PJ_FALSE; + if (hreq->cb.on_data_read) { + /* If application wishes to receive the data once available, call + * its callback. + */ + if (size > 0) + (*hreq->cb.on_data_read)(hreq, data, size); + } else { + if (hreq->response.size == 0) { + /* If we know the content length, allocate the data based + * on that, otherwise we'll use initial buffer size and grow + * it later if necessary. + */ + hreq->response.size = (hreq->response.content_length == -1 ? + INITIAL_DATA_BUF_SIZE : + hreq->response.content_length); + hreq->response.data = pj_pool_alloc(hreq->pool, + hreq->response.size); + } + + /* If the size of data received exceeds its current size, + * grow the buffer by a factor of 2. + */ + if (hreq->tcp_state.current_read_size + size > + hreq->response.size) + { + void *olddata = hreq->response.data; + + hreq->response.data = pj_pool_alloc(hreq->pool, + hreq->response.size << 1); + pj_memcpy(hreq->response.data, olddata, hreq->response.size); + hreq->response.size <<= 1; + } + + /* Append the response data. */ + pj_memcpy((char *)hreq->response.data + + hreq->tcp_state.current_read_size, data, size); + } + hreq->tcp_state.current_read_size += size; + + /* If the total data received so far is equal to the content length + * or if it's already EOF. + */ + if ((hreq->response.content_length >=0 && + (pj_ssize_t)hreq->tcp_state.current_read_size >= + hreq->response.content_length) || + (status == PJ_EEOF && hreq->response.content_length == -1)) + { + /* Finish reading */ + http_req_end_request(hreq); + hreq->response.size = hreq->tcp_state.current_read_size; + + /* HTTP request is completed, call the callback. */ + if (hreq->cb.on_complete) { + (*hreq->cb.on_complete)(hreq, PJ_SUCCESS, &hreq->response); + } + + return PJ_FALSE; + } + + /* Error status or premature EOF. */ + if ((status != PJ_SUCCESS && status != PJ_EPENDING && status != PJ_EEOF) + || (status == PJ_EEOF && hreq->response.content_length > -1)) + { + hreq->error = status; + pj_http_req_cancel(hreq, PJ_TRUE); + return PJ_FALSE; + } + + return PJ_TRUE; +} + +/* Callback to be called when query has timed out */ +static void on_timeout( pj_timer_heap_t *timer_heap, + struct pj_timer_entry *entry) +{ + pj_http_req *hreq = (pj_http_req *) entry->user_data; + + PJ_UNUSED_ARG(timer_heap); + + /* Recheck that the request is still not completed, since there is a + * slight possibility of race condition (timer elapsed while at the + * same time response arrives). + */ + if (hreq->state == READING_COMPLETE) { + /* Yeah, we finish on time */ + return; + } + + /* Invalidate id. */ + hreq->timer_entry.id = 0; + + /* Request timed out. */ + hreq->error = PJ_ETIMEDOUT; + pj_http_req_cancel(hreq, PJ_TRUE); +} + +/* Parse authentication challenge */ +static pj_status_t parse_auth_chal(pj_pool_t *pool, pj_str_t *input, + pj_http_auth_chal *chal) +{ + pj_scanner scanner; + const pj_str_t REALM_STR = { "realm", 5}, + NONCE_STR = { "nonce", 5}, + ALGORITHM_STR = { "algorithm", 9 }, + STALE_STR = { "stale", 5}, + QOP_STR = { "qop", 3}, + OPAQUE_STR = { "opaque", 6}; + pj_status_t status = PJ_SUCCESS; + PJ_USE_EXCEPTION ; + + pj_scan_init(&scanner, input->ptr, input->slen, PJ_SCAN_AUTOSKIP_WS, + &on_syntax_error); + PJ_TRY { + /* Get auth scheme */ + if (*scanner.curptr == '"') { + pj_scan_get_quote(&scanner, '"', '"', &chal->scheme); + chal->scheme.ptr++; + chal->scheme.slen -= 2; + } else { + pj_scan_get_until_chr(&scanner, " \t\r\n", &chal->scheme); + } + + /* Loop parsing all parameters */ + for (;;) { + const char *end_param = ", \t\r\n;"; + pj_str_t name, value; + + /* Get pair of parameter name and value */ + value.ptr = NULL; + value.slen = 0; + pj_scan_get_until_chr(&scanner, "=, \t\r\n", &name); + if (*scanner.curptr == '=') { + pj_scan_get_char(&scanner); + if (!pj_scan_is_eof(&scanner)) { + if (*scanner.curptr == '"' || *scanner.curptr == '\'') { + int quote_char = *scanner.curptr; + pj_scan_get_quote(&scanner, quote_char, quote_char, + &value); + value.ptr++; + value.slen -= 2; + } else if (!strchr(end_param, *scanner.curptr)) { + pj_scan_get_until_chr(&scanner, end_param, &value); + } + } + value = pj_str_unescape(pool, &value); + } + + if (!pj_stricmp(&name, &REALM_STR)) { + chal->realm = value; + + } else if (!pj_stricmp(&name, &NONCE_STR)) { + chal->nonce = value; + + } else if (!pj_stricmp(&name, &ALGORITHM_STR)) { + chal->algorithm = value; + + } else if (!pj_stricmp(&name, &OPAQUE_STR)) { + chal->opaque = value; + + } else if (!pj_stricmp(&name, &QOP_STR)) { + chal->qop = value; + + } else if (!pj_stricmp(&name, &STALE_STR)) { + chal->stale = value.slen && + (*value.ptr != '0') && + (*value.ptr != 'f') && + (*value.ptr != 'F'); + + } + + /* Eat comma */ + if (!pj_scan_is_eof(&scanner) && *scanner.curptr == ',') + pj_scan_get_char(&scanner); + else + break; + } + + } + PJ_CATCH_ANY { + status = PJ_GET_EXCEPTION(); + pj_bzero(chal, sizeof(*chal)); + TRACE_((THIS_FILE, "Error: parsing of auth header failed")); + } + PJ_END; + pj_scan_fini(&scanner); + return status; +} + +/* The same as #pj_http_headers_add_elmt() with char * as + * its parameters. + */ +PJ_DEF(pj_status_t) pj_http_headers_add_elmt2(pj_http_headers *headers, + char *name, char *val) +{ + pj_str_t f, v; + pj_cstr(&f, name); + pj_cstr(&v, val); + return pj_http_headers_add_elmt(headers, &f, &v); +} + +PJ_DEF(pj_status_t) pj_http_headers_add_elmt(pj_http_headers *headers, + pj_str_t *name, + pj_str_t *val) +{ + PJ_ASSERT_RETURN(headers && name && val, PJ_FALSE); + if (headers->count >= PJ_HTTP_HEADER_SIZE) + return PJ_ETOOMANY; + pj_strassign(&headers->header[headers->count].name, name); + pj_strassign(&headers->header[headers->count++].value, val); + return PJ_SUCCESS; +} + +static pj_status_t http_response_parse(pj_pool_t *pool, + pj_http_resp *response, + void *data, pj_size_t size, + pj_size_t *remainder) +{ + pj_size_t i; + char *cptr; + char *end_status, *newdata; + pj_scanner scanner; + pj_str_t s; + const pj_str_t STR_CONTENT_LENGTH = { CONTENT_LENGTH, 14 }; + pj_status_t status; + + PJ_USE_EXCEPTION; + + PJ_ASSERT_RETURN(response, PJ_EINVAL); + if (size < 2) + return PJLIB_UTIL_EHTTPINCHDR; + /* Detect whether we already receive the response's status-line + * and its headers. We're looking for a pair of CRLFs. A pair of + * LFs is also supported although it is not RFC standard. + */ + cptr = (char *)data; + for (i = 1, cptr++; i < size; i++, cptr++) { + if (*cptr == '\n') { + if (*(cptr - 1) == '\n') + break; + if (*(cptr - 1) == '\r') { + if (i >= 3 && *(cptr - 2) == '\n' && *(cptr - 3) == '\r') + break; + } + } + } + if (i == size) + return PJLIB_UTIL_EHTTPINCHDR; + *remainder = size - 1 - i; + + pj_bzero(response, sizeof(response)); + response->content_length = -1; + + newdata = (char*) pj_pool_alloc(pool, i); + pj_memcpy(newdata, data, i); + + /* Parse the status-line. */ + pj_scan_init(&scanner, newdata, i, 0, &on_syntax_error); + PJ_TRY { + pj_scan_get_until_ch(&scanner, ' ', &response->version); + pj_scan_advance_n(&scanner, 1, PJ_FALSE); + pj_scan_get_until_ch(&scanner, ' ', &s); + response->status_code = (pj_uint16_t)pj_strtoul(&s); + pj_scan_advance_n(&scanner, 1, PJ_FALSE); + pj_scan_get_until_ch(&scanner, '\n', &response->reason); + if (response->reason.ptr[response->reason.slen-1] == '\r') + response->reason.slen--; + } + PJ_CATCH_ANY { + pj_scan_fini(&scanner); + return PJ_GET_EXCEPTION(); + } + PJ_END; + + end_status = scanner.curptr; + pj_scan_fini(&scanner); + + /* Parse the response headers. */ + size = i - 2 - (end_status - newdata); + if (size > 0) { + status = http_headers_parse(end_status + 1, size, + &response->headers); + } else { + status = PJ_SUCCESS; + } + + /* Find content-length header field. */ + for (i = 0; i < response->headers.count; i++) { + if (!pj_stricmp(&response->headers.header[i].name, + &STR_CONTENT_LENGTH)) + { + response->content_length = + pj_strtoul(&response->headers.header[i].value); + /* If content length is zero, make sure that it is because the + * header value is really zero and not due to parsing error. + */ + if (response->content_length == 0) { + if (pj_strcmp2(&response->headers.header[i].value, "0")) { + response->content_length = -1; + } + } + break; + } + } + + return status; +} + +static pj_status_t http_headers_parse(char *hdata, pj_size_t size, + pj_http_headers *headers) +{ + pj_scanner scanner; + pj_str_t s, s2; + pj_status_t status; + PJ_USE_EXCEPTION; + + PJ_ASSERT_RETURN(headers, PJ_EINVAL); + + pj_scan_init(&scanner, hdata, size, 0, &on_syntax_error); + + /* Parse each line of header field consisting of header field name and + * value, separated by ":" and any number of white spaces. + */ + PJ_TRY { + do { + pj_scan_get_until_chr(&scanner, ":\n", &s); + if (*scanner.curptr == ':') { + pj_scan_advance_n(&scanner, 1, PJ_TRUE); + pj_scan_get_until_ch(&scanner, '\n', &s2); + if (s2.ptr[s2.slen-1] == '\r') + s2.slen--; + status = pj_http_headers_add_elmt(headers, &s, &s2); + if (status != PJ_SUCCESS) + PJ_THROW(status); + } + pj_scan_advance_n(&scanner, 1, PJ_TRUE); + /* Finish parsing */ + if (pj_scan_is_eof(&scanner)) + break; + } while (1); + } + PJ_CATCH_ANY { + pj_scan_fini(&scanner); + return PJ_GET_EXCEPTION(); + } + PJ_END; + + pj_scan_fini(&scanner); + + return PJ_SUCCESS; +} + +PJ_DEF(void) pj_http_req_param_default(pj_http_req_param *param) +{ + pj_assert(param); + pj_bzero(param, sizeof(*param)); + param->addr_family = pj_AF_INET(); + pj_strset2(¶m->method, (char*)http_method_names[HTTP_GET]); + pj_strset2(¶m->version, (char*)HTTP_1_0); + param->timeout.msec = PJ_HTTP_DEFAULT_TIMEOUT; + pj_time_val_normalize(¶m->timeout); + param->max_retries = 3; +} + +/* Get the location of '@' character to indicate the end of + * user:passwd part of an URI. If user:passwd part is not + * present, NULL will be returned. + */ +static char *get_url_at_pos(const char *str, long len) +{ + const char *end = str + len; + const char *p = str; + + /* skip scheme: */ + while (p!=end && *p!='/') ++p; + if (p!=end && *p=='/') ++p; + if (p!=end && *p=='/') ++p; + if (p==end) return NULL; + + for (; p!=end; ++p) { + switch (*p) { + case '/': + return NULL; + case '@': + return (char*)p; + } + } + + return NULL; +} + + +PJ_DEF(pj_status_t) pj_http_req_parse_url(const pj_str_t *url, + pj_http_url *hurl) +{ + pj_scanner scanner; + int len = url->slen; + PJ_USE_EXCEPTION; + + if (!len) return -1; + + pj_bzero(hurl, sizeof(*hurl)); + pj_scan_init(&scanner, url->ptr, url->slen, 0, &on_syntax_error); + + PJ_TRY { + pj_str_t s; + + /* Exhaust any whitespaces. */ + pj_scan_skip_whitespace(&scanner); + + /* Parse the protocol */ + pj_scan_get_until_ch(&scanner, ':', &s); + if (!pj_stricmp2(&s, http_protocol_names[PROTOCOL_HTTP])) { + pj_strset2(&hurl->protocol, + (char*)http_protocol_names[PROTOCOL_HTTP]); + } else if (!pj_stricmp2(&s, http_protocol_names[PROTOCOL_HTTPS])) { + pj_strset2(&hurl->protocol, + (char*)http_protocol_names[PROTOCOL_HTTPS]); + } else { + PJ_THROW(PJ_ENOTSUP); // unsupported protocol + } + + if (pj_scan_strcmp(&scanner, "://", 3)) { + PJ_THROW(PJLIB_UTIL_EHTTPINURL); // no "://" after protocol name + } + pj_scan_advance_n(&scanner, 3, PJ_FALSE); + + if (get_url_at_pos(url->ptr, url->slen)) { + /* Parse username and password */ + pj_scan_get_until_chr(&scanner, ":@", &hurl->username); + if (*scanner.curptr == ':') { + pj_scan_get_char(&scanner); + pj_scan_get_until_chr(&scanner, "@", &hurl->passwd); + } else { + hurl->passwd.slen = 0; + } + pj_scan_get_char(&scanner); + } + + /* Parse the host and port number (if any) */ + pj_scan_get_until_chr(&scanner, ":/", &s); + pj_strassign(&hurl->host, &s); + if (hurl->host.slen==0) + PJ_THROW(PJ_EINVAL); + if (pj_scan_is_eof(&scanner) || *scanner.curptr == '/') { + /* No port number specified */ + /* Assume default http/https port number */ + hurl->port = get_http_default_port(&hurl->protocol); + pj_assert(hurl->port > 0); + } else { + pj_scan_advance_n(&scanner, 1, PJ_FALSE); + pj_scan_get_until_ch(&scanner, '/', &s); + /* Parse the port number */ + hurl->port = (pj_uint16_t)pj_strtoul(&s); + if (!hurl->port) + PJ_THROW(PJLIB_UTIL_EHTTPINPORT); // invalid port number + } + + if (!pj_scan_is_eof(&scanner)) { + hurl->path.ptr = scanner.curptr; + hurl->path.slen = scanner.end - scanner.curptr; + } else { + /* no path, append '/' */ + pj_cstr(&hurl->path, "/"); + } + } + PJ_CATCH_ANY { + pj_scan_fini(&scanner); + return PJ_GET_EXCEPTION(); + } + PJ_END; + + pj_scan_fini(&scanner); + return PJ_SUCCESS; +} + +PJ_DEF(void) pj_http_req_set_timeout(pj_http_req *http_req, + const pj_time_val* timeout) +{ + pj_memcpy(&http_req->param.timeout, timeout, sizeof(*timeout)); +} + +PJ_DEF(pj_status_t) pj_http_req_create(pj_pool_t *pool, + const pj_str_t *url, + pj_timer_heap_t *timer, + pj_ioqueue_t *ioqueue, + const pj_http_req_param *param, + const pj_http_req_callback *hcb, + pj_http_req **http_req) +{ + pj_pool_t *own_pool; + pj_http_req *hreq; + char *at_pos; + pj_status_t status; + + PJ_ASSERT_RETURN(pool && url && timer && ioqueue && + hcb && http_req, PJ_EINVAL); + + *http_req = NULL; + own_pool = pj_pool_create(pool->factory, NULL, INITIAL_POOL_SIZE, + POOL_INCREMENT_SIZE, NULL); + hreq = PJ_POOL_ZALLOC_T(own_pool, struct pj_http_req); + if (!hreq) + return PJ_ENOMEM; + + /* Initialization */ + hreq->pool = own_pool; + hreq->ioqueue = ioqueue; + hreq->timer = timer; + hreq->asock = NULL; + pj_memcpy(&hreq->cb, hcb, sizeof(*hcb)); + hreq->state = IDLE; + hreq->resolved = PJ_FALSE; + hreq->buffer.ptr = NULL; + pj_timer_entry_init(&hreq->timer_entry, 0, hreq, &on_timeout); + + /* Initialize parameter */ + if (param) { + pj_memcpy(&hreq->param, param, sizeof(*param)); + /* TODO: validate the param here + * Should we validate the method as well? If yes, based on all HTTP + * methods or based on supported methods only? For the later, one + * drawback would be that you can't use this if the method is not + * officially supported + */ + PJ_ASSERT_RETURN(hreq->param.addr_family==PJ_AF_UNSPEC || + hreq->param.addr_family==PJ_AF_INET || + hreq->param.addr_family==PJ_AF_INET6, PJ_EAFNOTSUP); + PJ_ASSERT_RETURN(!pj_strcmp2(&hreq->param.version, HTTP_1_0) || + !pj_strcmp2(&hreq->param.version, HTTP_1_1), + PJ_ENOTSUP); + pj_time_val_normalize(&hreq->param.timeout); + } else { + pj_http_req_param_default(&hreq->param); + } + + /* Parse the URL */ + if (!pj_strdup_with_null(hreq->pool, &hreq->url, url)) { + pj_pool_release(hreq->pool); + return PJ_ENOMEM; + } + status = pj_http_req_parse_url(&hreq->url, &hreq->hurl); + if (status != PJ_SUCCESS) { + pj_pool_release(hreq->pool); + return status; // Invalid URL supplied + } + + /* If URL contains username/password, move them to credential and + * remove them from the URL. + */ + if ((at_pos=get_url_at_pos(hreq->url.ptr, hreq->url.slen)) != NULL) { + pj_str_t tmp; + char *user_pos = pj_strchr(&hreq->url, '/'); + int removed_len; + + /* Save credential first, unescape the string */ + tmp = pj_str_unescape(hreq->pool, &hreq->hurl.username);; + pj_strdup(hreq->pool, &hreq->param.auth_cred.username, &tmp); + + tmp = pj_str_unescape(hreq->pool, &hreq->hurl.passwd); + pj_strdup(hreq->pool, &hreq->param.auth_cred.data, &tmp); + + hreq->hurl.username.ptr = hreq->hurl.passwd.ptr = NULL; + hreq->hurl.username.slen = hreq->hurl.passwd.slen = 0; + + /* Remove "username:password@" from the URL */ + pj_assert(user_pos != 0 && user_pos < at_pos); + user_pos += 2; + removed_len = at_pos + 1 - user_pos; + pj_memmove(user_pos, at_pos+1, hreq->url.ptr+hreq->url.slen-at_pos-1); + hreq->url.slen -= removed_len; + + /* Need to adjust hostname and path pointers due to memmove*/ + if (hreq->hurl.host.ptr > user_pos && + hreq->hurl.host.ptr < user_pos + hreq->url.slen) + { + hreq->hurl.host.ptr -= removed_len; + } + /* path may come from a string constant, don't shift it if so */ + if (hreq->hurl.path.ptr > user_pos && + hreq->hurl.path.ptr < user_pos + hreq->url.slen) + { + hreq->hurl.path.ptr -= removed_len; + } + } + + *http_req = hreq; + return PJ_SUCCESS; +} + +PJ_DEF(pj_bool_t) pj_http_req_is_running(const pj_http_req *http_req) +{ + PJ_ASSERT_RETURN(http_req, PJ_FALSE); + return (http_req->state != IDLE); +} + +PJ_DEF(void*) pj_http_req_get_user_data(pj_http_req *http_req) +{ + PJ_ASSERT_RETURN(http_req, NULL); + return http_req->param.user_data; +} + +static pj_status_t start_http_req(pj_http_req *http_req, + pj_bool_t notify_on_fail) +{ + pj_sock_t sock = PJ_INVALID_SOCKET; + pj_status_t status; + pj_activesock_cb asock_cb; + int retry = 0; + + PJ_ASSERT_RETURN(http_req, PJ_EINVAL); + /* Http request is not idle, a request was initiated before and + * is still in progress + */ + PJ_ASSERT_RETURN(http_req->state == IDLE, PJ_EBUSY); + + /* Reset few things to make sure restarting works */ + http_req->error = 0; + http_req->response.headers.count = 0; + pj_bzero(&http_req->tcp_state, sizeof(http_req->tcp_state)); + + if (!http_req->resolved) { + /* Resolve the Internet address of the host */ + status = pj_sockaddr_init(http_req->param.addr_family, + &http_req->addr, &http_req->hurl.host, + http_req->hurl.port); + if (status != PJ_SUCCESS || + !pj_sockaddr_has_addr(&http_req->addr) || + (http_req->param.addr_family==pj_AF_INET() && + http_req->addr.ipv4.sin_addr.s_addr==PJ_INADDR_NONE)) + { + goto on_return; + } + http_req->resolved = PJ_TRUE; + } + + status = pj_sock_socket(http_req->param.addr_family, pj_SOCK_STREAM(), + 0, &sock); + if (status != PJ_SUCCESS) + goto on_return; // error creating socket + + pj_bzero(&asock_cb, sizeof(asock_cb)); + asock_cb.on_data_read = &http_on_data_read; + asock_cb.on_data_sent = &http_on_data_sent; + asock_cb.on_connect_complete = &http_on_connect; + + do + { + pj_sockaddr_in bound_addr; + pj_uint16_t port = 0; + + /* If we are using port restriction. + * Get a random port within the range + */ + if (http_req->param.source_port_range_start != 0) { + port = (pj_uint16_t) + (http_req->param.source_port_range_start + + (pj_rand() % http_req->param.source_port_range_size)); + } + + pj_sockaddr_in_init(&bound_addr, NULL, port); + status = pj_sock_bind(sock, &bound_addr, sizeof(bound_addr)); + + } while (status != PJ_SUCCESS && (retry++ < http_req->param.max_retries)); + + if (status != PJ_SUCCESS) { + PJ_PERROR(1,(THIS_FILE, status, + "Unable to bind to the requested port")); + pj_sock_close(sock); + goto on_return; + } + + // TODO: should we set whole data to 0 by default? + // or add it in the param? + status = pj_activesock_create(http_req->pool, sock, pj_SOCK_STREAM(), + NULL, http_req->ioqueue, + &asock_cb, http_req, &http_req->asock); + if (status != PJ_SUCCESS) { + pj_sock_close(sock); + goto on_return; // error creating activesock + } + + /* Schedule timeout timer for the request */ + pj_assert(http_req->timer_entry.id == 0); + http_req->timer_entry.id = 1; + status = pj_timer_heap_schedule(http_req->timer, &http_req->timer_entry, + &http_req->param.timeout); + if (status != PJ_SUCCESS) { + http_req->timer_entry.id = 0; + goto on_return; // error scheduling timer + } + + /* Connect to host */ + http_req->state = CONNECTING; + status = pj_activesock_start_connect(http_req->asock, http_req->pool, + (pj_sock_t *)&(http_req->addr), + pj_sockaddr_get_len(&http_req->addr)); + if (status == PJ_SUCCESS) { + http_req->state = SENDING_REQUEST; + status = http_req_start_sending(http_req); + if (status != PJ_SUCCESS) + goto on_return; + } else if (status != PJ_EPENDING) { + goto on_return; // error connecting + } + + return PJ_SUCCESS; + +on_return: + http_req->error = status; + if (notify_on_fail) + pj_http_req_cancel(http_req, PJ_TRUE); + else + http_req_end_request(http_req); + + return status; +} + +/* Starts an asynchronous HTTP request to the URL specified. */ +PJ_DEF(pj_status_t) pj_http_req_start(pj_http_req *http_req) +{ + return start_http_req(http_req, PJ_FALSE); +} + +/* Respond to basic authentication challenge */ +static pj_status_t auth_respond_basic(pj_http_req *hreq) +{ + /* Basic authentication: + * credentials = "Basic" basic-credentials + * basic-credentials = base64-user-pass + * base64-user-pass = <base64 [4] encoding of user-pass> + * user-pass = userid ":" password + * + * Sample: + * Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ== + */ + pj_str_t user_pass; + pj_http_header_elmt *phdr; + int len; + + /* Use send buffer to store userid ":" password */ + user_pass.ptr = hreq->buffer.ptr; + pj_strcpy(&user_pass, &hreq->param.auth_cred.username); + pj_strcat2(&user_pass, ":"); + pj_strcat(&user_pass, &hreq->param.auth_cred.data); + + /* Create Authorization header */ + phdr = &hreq->param.headers.header[hreq->param.headers.count++]; + pj_bzero(phdr, sizeof(*phdr)); + if (hreq->response.status_code == 401) + phdr->name = pj_str("Authorization"); + else + phdr->name = pj_str("Proxy-Authorization"); + + len = PJ_BASE256_TO_BASE64_LEN(user_pass.slen) + 10; + phdr->value.ptr = (char*)pj_pool_alloc(hreq->pool, len); + phdr->value.slen = 0; + + pj_strcpy2(&phdr->value, "Basic "); + len -= phdr->value.slen; + pj_base64_encode((pj_uint8_t*)user_pass.ptr, (int)user_pass.slen, + phdr->value.ptr + phdr->value.slen, &len); + phdr->value.slen += len; + + return PJ_SUCCESS; +} + +/** Length of digest string. */ +#define MD5_STRLEN 32 +/* A macro just to get rid of type mismatch between char and unsigned char */ +#define MD5_APPEND(pms,buf,len) pj_md5_update(pms, (const pj_uint8_t*)buf, len) + +/* Transform digest to string. + * output must be at least PJSIP_MD5STRLEN+1 bytes. + * + * NOTE: THE OUTPUT STRING IS NOT NULL TERMINATED! + */ +static void digest2str(const unsigned char digest[], char *output) +{ + int i; + for (i = 0; i<16; ++i) { + pj_val_to_hex_digit(digest[i], output); + output += 2; + } +} + +static void auth_create_digest_response(pj_str_t *result, + const pj_http_auth_cred *cred, + const pj_str_t *nonce, + const pj_str_t *nc, + const pj_str_t *cnonce, + const pj_str_t *qop, + const pj_str_t *uri, + const pj_str_t *realm, + const pj_str_t *method) +{ + char ha1[MD5_STRLEN]; + char ha2[MD5_STRLEN]; + unsigned char digest[16]; + pj_md5_context pms; + + pj_assert(result->slen >= MD5_STRLEN); + + TRACE_((THIS_FILE, "Begin creating digest")); + + if (cred->data_type == 0) { + /*** + *** ha1 = MD5(username ":" realm ":" password) + ***/ + pj_md5_init(&pms); + MD5_APPEND( &pms, cred->username.ptr, cred->username.slen); + MD5_APPEND( &pms, ":", 1); + MD5_APPEND( &pms, realm->ptr, realm->slen); + MD5_APPEND( &pms, ":", 1); + MD5_APPEND( &pms, cred->data.ptr, cred->data.slen); + pj_md5_final(&pms, digest); + + digest2str(digest, ha1); + + } else if (cred->data_type == 1) { + pj_assert(cred->data.slen == 32); + pj_memcpy( ha1, cred->data.ptr, cred->data.slen ); + } else { + pj_assert(!"Invalid data_type"); + } + + TRACE_((THIS_FILE, " ha1=%.32s", ha1)); + + /*** + *** ha2 = MD5(method ":" req_uri) + ***/ + pj_md5_init(&pms); + MD5_APPEND( &pms, method->ptr, method->slen); + MD5_APPEND( &pms, ":", 1); + MD5_APPEND( &pms, uri->ptr, uri->slen); + pj_md5_final(&pms, digest); + digest2str(digest, ha2); + + TRACE_((THIS_FILE, " ha2=%.32s", ha2)); + + /*** + *** When qop is not used: + *** response = MD5(ha1 ":" nonce ":" ha2) + *** + *** When qop=auth is used: + *** response = MD5(ha1 ":" nonce ":" nc ":" cnonce ":" qop ":" ha2) + ***/ + pj_md5_init(&pms); + MD5_APPEND( &pms, ha1, MD5_STRLEN); + MD5_APPEND( &pms, ":", 1); + MD5_APPEND( &pms, nonce->ptr, nonce->slen); + if (qop && qop->slen != 0) { + MD5_APPEND( &pms, ":", 1); + MD5_APPEND( &pms, nc->ptr, nc->slen); + MD5_APPEND( &pms, ":", 1); + MD5_APPEND( &pms, cnonce->ptr, cnonce->slen); + MD5_APPEND( &pms, ":", 1); + MD5_APPEND( &pms, qop->ptr, qop->slen); + } + MD5_APPEND( &pms, ":", 1); + MD5_APPEND( &pms, ha2, MD5_STRLEN); + + /* This is the final response digest. */ + pj_md5_final(&pms, digest); + + /* Convert digest to string and store in chal->response. */ + result->slen = MD5_STRLEN; + digest2str(digest, result->ptr); + + TRACE_((THIS_FILE, " digest=%.32s", result->ptr)); + TRACE_((THIS_FILE, "Digest created")); +} + +/* Find out if qop offer contains "auth" token */ +static pj_bool_t auth_has_qop( pj_pool_t *pool, const pj_str_t *qop_offer) +{ + pj_str_t qop; + char *p; + + pj_strdup_with_null( pool, &qop, qop_offer); + p = qop.ptr; + while (*p) { + *p = (char)pj_tolower(*p); + ++p; + } + + p = qop.ptr; + while (*p) { + if (*p=='a' && *(p+1)=='u' && *(p+2)=='t' && *(p+3)=='h') { + int e = *(p+4); + if (e=='"' || e==',' || e==0) + return PJ_TRUE; + else + p += 4; + } else { + ++p; + } + } + + return PJ_FALSE; +} + +#define STR_PREC(s) (int)(s).slen, (s).ptr + +/* Respond to digest authentication */ +static pj_status_t auth_respond_digest(pj_http_req *hreq) +{ + const pj_http_auth_chal *chal = &hreq->response.auth_chal; + const pj_http_auth_cred *cred = &hreq->param.auth_cred; + pj_http_header_elmt *phdr; + char digest_response_buf[MD5_STRLEN]; + int len; + pj_str_t digest_response; + + /* Check algorithm is supported. We only support MD5 */ + if (chal->algorithm.slen!=0 && + pj_stricmp2(&chal->algorithm, "MD5")) + { + TRACE_((THIS_FILE, "Error: Unsupported digest algorithm \"%.*s\"", + chal->algorithm.slen, chal->algorithm.ptr)); + return PJ_ENOTSUP; + } + + /* Add Authorization header */ + phdr = &hreq->param.headers.header[hreq->param.headers.count++]; + pj_bzero(phdr, sizeof(*phdr)); + if (hreq->response.status_code == 401) + phdr->name = pj_str("Authorization"); + else + phdr->name = pj_str("Proxy-Authorization"); + + /* Allocate space for the header */ + len = 8 + /* Digest */ + 16 + hreq->param.auth_cred.username.slen + /* username= */ + 12 + chal->realm.slen + /* realm= */ + 12 + chal->nonce.slen + /* nonce= */ + 8 + hreq->hurl.path.slen + /* uri= */ + 16 + /* algorithm=MD5 */ + 16 + MD5_STRLEN + /* response= */ + 12 + /* qop=auth */ + 8 + /* nc=.. */ + 30 + /* cnonce= */ + 12 + chal->opaque.slen + /* opaque=".." */ + 0; + phdr->value.ptr = (char*)pj_pool_alloc(hreq->pool, len); + + /* Configure buffer to temporarily store the digest */ + digest_response.ptr = digest_response_buf; + digest_response.slen = MD5_STRLEN; + + if (chal->qop.slen == 0) { + const pj_str_t STR_MD5 = { "MD5", 3 }; + + /* Server doesn't require quality of protection. */ + auth_create_digest_response(&digest_response, cred, + &chal->nonce, NULL, NULL, NULL, + &hreq->hurl.path, &chal->realm, + &hreq->param.method); + + len = pj_ansi_snprintf( + phdr->value.ptr, len, + "Digest username=\"%.*s\", " + "realm=\"%.*s\", " + "nonce=\"%.*s\", " + "uri=\"%.*s\", " + "algorithm=%.*s, " + "response=\"%.*s\"", + STR_PREC(cred->username), + STR_PREC(chal->realm), + STR_PREC(chal->nonce), + STR_PREC(hreq->hurl.path), + STR_PREC(STR_MD5), + STR_PREC(digest_response)); + if (len < 0) + return PJ_ETOOSMALL; + phdr->value.slen = len; + + } else if (auth_has_qop(hreq->pool, &chal->qop)) { + /* Server requires quality of protection. + * We respond with selecting "qop=auth" protection. + */ + const pj_str_t STR_MD5 = { "MD5", 3 }; + const pj_str_t qop = pj_str("auth"); + const pj_str_t nc = pj_str("00000001"); + const pj_str_t cnonce = pj_str("b39971"); + + auth_create_digest_response(&digest_response, cred, + &chal->nonce, &nc, &cnonce, &qop, + &hreq->hurl.path, &chal->realm, + &hreq->param.method); + len = pj_ansi_snprintf( + phdr->value.ptr, len, + "Digest username=\"%.*s\", " + "realm=\"%.*s\", " + "nonce=\"%.*s\", " + "uri=\"%.*s\", " + "algorithm=%.*s, " + "response=\"%.*s\", " + "qop=%.*s, " + "nc=%.*s, " + "cnonce=\"%.*s\"", + STR_PREC(cred->username), + STR_PREC(chal->realm), + STR_PREC(chal->nonce), + STR_PREC(hreq->hurl.path), + STR_PREC(STR_MD5), + STR_PREC(digest_response), + STR_PREC(qop), + STR_PREC(nc), + STR_PREC(cnonce)); + if (len < 0) + return PJ_ETOOSMALL; + phdr->value.slen = len; + + if (chal->opaque.slen) { + pj_strcat2(&phdr->value, ", opaque=\""); + pj_strcat(&phdr->value, &chal->opaque); + pj_strcat2(&phdr->value, "\""); + } + + } else { + /* Server requires quality protection that we don't support. */ + TRACE_((THIS_FILE, "Error: Unsupported qop offer %.*s", + chal->qop.slen, chal->qop.ptr)); + return PJ_ENOTSUP; + } + + return PJ_SUCCESS; +} + + +static void restart_req_with_auth(pj_http_req *hreq) +{ + pj_http_auth_chal *chal = &hreq->response.auth_chal; + pj_http_auth_cred *cred = &hreq->param.auth_cred; + pj_status_t status; + + if (hreq->param.headers.count >= PJ_HTTP_HEADER_SIZE) { + TRACE_((THIS_FILE, "Error: no place to put Authorization header")); + hreq->auth_state = AUTH_DONE; + return; + } + + /* If credential specifies specific scheme, make sure they match */ + if (cred->scheme.slen && pj_stricmp(&chal->scheme, &cred->scheme)) { + status = PJ_ENOTSUP; + TRACE_((THIS_FILE, "Error: auth schemes mismatch")); + goto on_error; + } + + /* If credential specifies specific realm, make sure they match */ + if (cred->realm.slen && pj_stricmp(&chal->realm, &cred->realm)) { + status = PJ_ENOTSUP; + TRACE_((THIS_FILE, "Error: auth realms mismatch")); + goto on_error; + } + + if (!pj_stricmp2(&chal->scheme, "basic")) { + status = auth_respond_basic(hreq); + } else if (!pj_stricmp2(&chal->scheme, "digest")) { + status = auth_respond_digest(hreq); + } else { + TRACE_((THIS_FILE, "Error: unsupported HTTP auth scheme")); + status = PJ_ENOTSUP; + } + + if (status != PJ_SUCCESS) + goto on_error; + + http_req_end_request(hreq); + + status = start_http_req(hreq, PJ_TRUE); + if (status != PJ_SUCCESS) + goto on_error; + + hreq->auth_state = AUTH_RETRYING; + return; + +on_error: + hreq->auth_state = AUTH_DONE; +} + + +/* snprintf() to a pj_str_t struct with an option to append the + * result at the back of the string. + */ +void str_snprintf(pj_str_t *s, size_t size, + pj_bool_t append, const char *format, ...) +{ + va_list arg; + int retval; + + va_start(arg, format); + if (!append) + s->slen = 0; + size -= s->slen; + retval = pj_ansi_vsnprintf(s->ptr + s->slen, + size, format, arg); + s->slen += ((retval < (int)size) ? retval : size - 1); + va_end(arg); +} + +static pj_status_t http_req_start_sending(pj_http_req *hreq) +{ + pj_status_t status; + pj_str_t pkt; + pj_ssize_t len; + pj_size_t i; + + PJ_ASSERT_RETURN(hreq->state == SENDING_REQUEST || + hreq->state == SENDING_REQUEST_BODY, PJ_EBUG); + + if (hreq->state == SENDING_REQUEST) { + /* Prepare the request data */ + if (!hreq->buffer.ptr) + hreq->buffer.ptr = (char*)pj_pool_alloc(hreq->pool, BUF_SIZE); + pj_strassign(&pkt, &hreq->buffer); + pkt.slen = 0; + /* Start-line */ + str_snprintf(&pkt, BUF_SIZE, PJ_TRUE, "%.*s %.*s %s/%.*s\r\n", + STR_PREC(hreq->param.method), + STR_PREC(hreq->hurl.path), + get_protocol(&hreq->hurl.protocol), + STR_PREC(hreq->param.version)); + /* Header field "Host" */ + str_snprintf(&pkt, BUF_SIZE, PJ_TRUE, "Host: %.*s:%d\r\n", + STR_PREC(hreq->hurl.host), hreq->hurl.port); + if (!pj_strcmp2(&hreq->param.method, http_method_names[HTTP_PUT])) { + char buf[16]; + + /* Header field "Content-Length" */ + pj_utoa(hreq->param.reqdata.total_size ? + hreq->param.reqdata.total_size: + hreq->param.reqdata.size, buf); + str_snprintf(&pkt, BUF_SIZE, PJ_TRUE, "%s: %s\r\n", + CONTENT_LENGTH, buf); + } + + /* Append user-specified headers */ + for (i = 0; i < hreq->param.headers.count; i++) { + str_snprintf(&pkt, BUF_SIZE, PJ_TRUE, "%.*s: %.*s\r\n", + STR_PREC(hreq->param.headers.header[i].name), + STR_PREC(hreq->param.headers.header[i].value)); + } + if (pkt.slen >= BUF_SIZE - 1) { + status = PJLIB_UTIL_EHTTPINSBUF; + goto on_return; + } + + pj_strcat2(&pkt, "\r\n"); + pkt.ptr[pkt.slen] = 0; + TRACE_((THIS_FILE, "%s", pkt.ptr)); + } else { + pkt.ptr = (char*)hreq->param.reqdata.data; + pkt.slen = hreq->param.reqdata.size; + } + + /* Send the request */ + len = pj_strlen(&pkt); + pj_ioqueue_op_key_init(&hreq->op_key, sizeof(hreq->op_key)); + hreq->tcp_state.send_size = len; + hreq->tcp_state.current_send_size = 0; + status = pj_activesock_send(hreq->asock, &hreq->op_key, + pkt.ptr, &len, 0); + + if (status == PJ_SUCCESS) { + http_on_data_sent(hreq->asock, &hreq->op_key, len); + } else if (status != PJ_EPENDING) { + goto on_return; // error sending data + } + + return PJ_SUCCESS; + +on_return: + http_req_end_request(hreq); + return status; +} + +static pj_status_t http_req_start_reading(pj_http_req *hreq) +{ + pj_status_t status; + + PJ_ASSERT_RETURN(hreq->state == REQUEST_SENT, PJ_EBUG); + + /* Receive the response */ + hreq->state = READING_RESPONSE; + hreq->tcp_state.current_read_size = 0; + pj_assert(hreq->buffer.ptr); + status = pj_activesock_start_read2(hreq->asock, hreq->pool, BUF_SIZE, + (void**)&hreq->buffer.ptr, 0); + if (status != PJ_SUCCESS) { + /* Error reading */ + http_req_end_request(hreq); + return status; + } + + return PJ_SUCCESS; +} + +static pj_status_t http_req_end_request(pj_http_req *hreq) +{ + if (hreq->asock) { + pj_activesock_close(hreq->asock); + hreq->asock = NULL; + } + + /* Cancel query timeout timer. */ + if (hreq->timer_entry.id != 0) { + pj_timer_heap_cancel(hreq->timer, &hreq->timer_entry); + /* Invalidate id. */ + hreq->timer_entry.id = 0; + } + + hreq->state = IDLE; + + return PJ_SUCCESS; +} + +PJ_DEF(pj_status_t) pj_http_req_cancel(pj_http_req *http_req, + pj_bool_t notify) +{ + http_req->state = ABORTING; + + http_req_end_request(http_req); + + if (notify && http_req->cb.on_complete) { + (*http_req->cb.on_complete)(http_req, (!http_req->error? + PJ_ECANCELLED: http_req->error), NULL); + } + + return PJ_SUCCESS; +} + + +PJ_DEF(pj_status_t) pj_http_req_destroy(pj_http_req *http_req) +{ + PJ_ASSERT_RETURN(http_req, PJ_EINVAL); + + /* If there is any pending request, cancel it */ + if (http_req->state != IDLE) { + pj_http_req_cancel(http_req, PJ_FALSE); + } + + pj_pool_release(http_req->pool); + + return PJ_SUCCESS; +} |