Annotation of embedaddon/curl/docs/examples/multi-formadd.c, revision 1.1
1.1 ! misho 1: /***************************************************************************
! 2: * _ _ ____ _
! 3: * Project ___| | | | _ \| |
! 4: * / __| | | | |_) | |
! 5: * | (__| |_| | _ <| |___
! 6: * \___|\___/|_| \_\_____|
! 7: *
! 8: * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
! 9: *
! 10: * This software is licensed as described in the file COPYING, which
! 11: * you should have received as part of this distribution. The terms
! 12: * are also available at https://curl.haxx.se/docs/copyright.html.
! 13: *
! 14: * You may opt to use, copy, modify, merge, publish, distribute and/or sell
! 15: * copies of the Software, and permit persons to whom the Software is
! 16: * furnished to do so, under the terms of the COPYING file.
! 17: *
! 18: * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
! 19: * KIND, either express or implied.
! 20: *
! 21: ***************************************************************************/
! 22: /* <DESC>
! 23: * using the multi interface to do a multipart formpost without blocking
! 24: * </DESC>
! 25: */
! 26:
! 27: #include <stdio.h>
! 28: #include <string.h>
! 29: #include <sys/time.h>
! 30:
! 31: #include <curl/curl.h>
! 32:
! 33: int main(void)
! 34: {
! 35: CURL *curl;
! 36:
! 37: CURLM *multi_handle;
! 38: int still_running = 0;
! 39:
! 40: struct curl_httppost *formpost = NULL;
! 41: struct curl_httppost *lastptr = NULL;
! 42: struct curl_slist *headerlist = NULL;
! 43: static const char buf[] = "Expect:";
! 44:
! 45: /* Fill in the file upload field. This makes libcurl load data from
! 46: the given file name when curl_easy_perform() is called. */
! 47: curl_formadd(&formpost,
! 48: &lastptr,
! 49: CURLFORM_COPYNAME, "sendfile",
! 50: CURLFORM_FILE, "postit2.c",
! 51: CURLFORM_END);
! 52:
! 53: /* Fill in the filename field */
! 54: curl_formadd(&formpost,
! 55: &lastptr,
! 56: CURLFORM_COPYNAME, "filename",
! 57: CURLFORM_COPYCONTENTS, "postit2.c",
! 58: CURLFORM_END);
! 59:
! 60: /* Fill in the submit field too, even if this is rarely needed */
! 61: curl_formadd(&formpost,
! 62: &lastptr,
! 63: CURLFORM_COPYNAME, "submit",
! 64: CURLFORM_COPYCONTENTS, "send",
! 65: CURLFORM_END);
! 66:
! 67: curl = curl_easy_init();
! 68: multi_handle = curl_multi_init();
! 69:
! 70: /* initialize custom header list (stating that Expect: 100-continue is not
! 71: wanted */
! 72: headerlist = curl_slist_append(headerlist, buf);
! 73: if(curl && multi_handle) {
! 74:
! 75: /* what URL that receives this POST */
! 76: curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/upload.cgi");
! 77: curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
! 78:
! 79: curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
! 80: curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
! 81:
! 82: curl_multi_add_handle(multi_handle, curl);
! 83:
! 84: curl_multi_perform(multi_handle, &still_running);
! 85:
! 86: while(still_running) {
! 87: struct timeval timeout;
! 88: int rc; /* select() return code */
! 89: CURLMcode mc; /* curl_multi_fdset() return code */
! 90:
! 91: fd_set fdread;
! 92: fd_set fdwrite;
! 93: fd_set fdexcep;
! 94: int maxfd = -1;
! 95:
! 96: long curl_timeo = -1;
! 97:
! 98: FD_ZERO(&fdread);
! 99: FD_ZERO(&fdwrite);
! 100: FD_ZERO(&fdexcep);
! 101:
! 102: /* set a suitable timeout to play around with */
! 103: timeout.tv_sec = 1;
! 104: timeout.tv_usec = 0;
! 105:
! 106: curl_multi_timeout(multi_handle, &curl_timeo);
! 107: if(curl_timeo >= 0) {
! 108: timeout.tv_sec = curl_timeo / 1000;
! 109: if(timeout.tv_sec > 1)
! 110: timeout.tv_sec = 1;
! 111: else
! 112: timeout.tv_usec = (curl_timeo % 1000) * 1000;
! 113: }
! 114:
! 115: /* get file descriptors from the transfers */
! 116: mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
! 117:
! 118: if(mc != CURLM_OK) {
! 119: fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
! 120: break;
! 121: }
! 122:
! 123: /* On success the value of maxfd is guaranteed to be >= -1. We call
! 124: select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
! 125: no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
! 126: to sleep 100ms, which is the minimum suggested value in the
! 127: curl_multi_fdset() doc. */
! 128:
! 129: if(maxfd == -1) {
! 130: #ifdef _WIN32
! 131: Sleep(100);
! 132: rc = 0;
! 133: #else
! 134: /* Portable sleep for platforms other than Windows. */
! 135: struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
! 136: rc = select(0, NULL, NULL, NULL, &wait);
! 137: #endif
! 138: }
! 139: else {
! 140: /* Note that on some platforms 'timeout' may be modified by select().
! 141: If you need access to the original value save a copy beforehand. */
! 142: rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
! 143: }
! 144:
! 145: switch(rc) {
! 146: case -1:
! 147: /* select error */
! 148: break;
! 149: case 0:
! 150: default:
! 151: /* timeout or readable/writable sockets */
! 152: printf("perform!\n");
! 153: curl_multi_perform(multi_handle, &still_running);
! 154: printf("running: %d!\n", still_running);
! 155: break;
! 156: }
! 157: }
! 158:
! 159: curl_multi_cleanup(multi_handle);
! 160:
! 161: /* always cleanup */
! 162: curl_easy_cleanup(curl);
! 163:
! 164: /* then cleanup the formpost chain */
! 165: curl_formfree(formpost);
! 166:
! 167: /* free slist */
! 168: curl_slist_free_all(headerlist);
! 169: }
! 170: return 0;
! 171: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to multi-formadd.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / docs / examples