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examples: check more errors, fix cleanups, scope variables
Inspired by Joshua's report on examples. Closes #19055
This commit is contained in:
Viktor Szakats
parent
61dcb56743
commit
64ed2ea196
42 changed files with 874 additions and 785 deletions
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@ -43,21 +43,17 @@
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* Download an HTTP file and upload an FTP file simultaneously.
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*/
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#define HANDLECOUNT 2 /* Number of simultaneous transfers */
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#define HTTP_HANDLE 0 /* Index for the HTTP transfer */
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#define FTP_HANDLE 1 /* Index for the FTP transfer */
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#define HANDLECOUNT 2 /* Number of simultaneous transfers */
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int main(void)
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{
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CURL *handles[HANDLECOUNT];
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CURLM *multi_handle;
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int still_running = 0; /* keep number of running handles */
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int i;
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CURLMsg *msg; /* for picking up messages with the transfer status */
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int msgs_left; /* how many messages are left */
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CURLcode res = curl_global_init(CURL_GLOBAL_ALL);
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if(res)
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return (int)res;
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@ -74,124 +70,132 @@ int main(void)
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/* init a multi stack */
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multi_handle = curl_multi_init();
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if(multi_handle) {
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/* add the individual transfers */
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for(i = 0; i < HANDLECOUNT; i++)
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curl_multi_add_handle(multi_handle, handles[i]);
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int still_running = 0; /* keep number of running handles */
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/* we start some action by calling perform right away */
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curl_multi_perform(multi_handle, &still_running);
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CURLMsg *msg; /* for picking up messages with the transfer status */
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int msgs_left; /* how many messages are left */
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while(still_running) {
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struct timeval timeout;
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int rc; /* select() return code */
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CURLMcode mc; /* curl_multi_fdset() return code */
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/* add the individual transfers */
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for(i = 0; i < HANDLECOUNT; i++)
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curl_multi_add_handle(multi_handle, handles[i]);
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fd_set fdread;
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fd_set fdwrite;
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fd_set fdexcep;
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int maxfd = -1;
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/* we start some action by calling perform right away */
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curl_multi_perform(multi_handle, &still_running);
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long curl_timeo = -1;
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while(still_running) {
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FD_ZERO(&fdread);
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FD_ZERO(&fdwrite);
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FD_ZERO(&fdexcep);
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struct timeval timeout;
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int rc; /* select() return code */
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CURLMcode mc; /* curl_multi_fdset() return code */
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/* set a suitable timeout to play around with */
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timeout.tv_sec = 1;
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timeout.tv_usec = 0;
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fd_set fdread;
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fd_set fdwrite;
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fd_set fdexcep;
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int maxfd = -1;
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curl_multi_timeout(multi_handle, &curl_timeo);
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if(curl_timeo >= 0) {
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long curl_timeo = -1;
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FD_ZERO(&fdread);
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FD_ZERO(&fdwrite);
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FD_ZERO(&fdexcep);
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/* set a suitable timeout to play around with */
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timeout.tv_sec = 1;
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timeout.tv_usec = 0;
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curl_multi_timeout(multi_handle, &curl_timeo);
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if(curl_timeo >= 0) {
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#if defined(MSDOS) || defined(__AMIGA__)
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timeout.tv_sec = (time_t)(curl_timeo / 1000);
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timeout.tv_sec = (time_t)(curl_timeo / 1000);
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#else
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timeout.tv_sec = curl_timeo / 1000;
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timeout.tv_sec = curl_timeo / 1000;
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#endif
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if(timeout.tv_sec > 1)
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timeout.tv_sec = 1;
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else
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if(timeout.tv_sec > 1)
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timeout.tv_sec = 1;
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else
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#if defined(MSDOS) || defined(__AMIGA__)
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timeout.tv_usec = (time_t)(curl_timeo % 1000) * 1000;
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timeout.tv_usec = (time_t)(curl_timeo % 1000) * 1000;
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#else
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timeout.tv_usec = (int)(curl_timeo % 1000) * 1000;
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timeout.tv_usec = (int)(curl_timeo % 1000) * 1000;
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#endif
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}
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}
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/* get file descriptors from the transfers */
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mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
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/* get file descriptors from the transfers */
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mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
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if(mc != CURLM_OK) {
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fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
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break;
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}
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if(mc != CURLM_OK) {
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fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
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break;
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}
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/* On success the value of maxfd is guaranteed to be >= -1. We call
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select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
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no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
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to sleep 100ms, which is the minimum suggested value in the
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curl_multi_fdset() doc. */
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/* On success the value of maxfd is guaranteed to be >= -1. We call
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select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
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no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
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to sleep 100ms, which is the minimum suggested value in the
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curl_multi_fdset() doc. */
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if(maxfd == -1) {
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if(maxfd == -1) {
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#ifdef _WIN32
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Sleep(100);
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rc = 0;
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Sleep(100);
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rc = 0;
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#else
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/* Portable sleep for platforms other than Windows. */
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struct timeval wait = {0};
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wait.tv_usec = 100 * 1000; /* 100ms */
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rc = select(0, NULL, NULL, NULL, &wait);
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/* Portable sleep for platforms other than Windows. */
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struct timeval wait = {0};
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wait.tv_usec = 100 * 1000; /* 100ms */
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rc = select(0, NULL, NULL, NULL, &wait);
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#endif
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}
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else {
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/* Note that on some platforms 'timeout' may be modified by select().
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If you need access to the original value save a copy beforehand. */
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rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
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}
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else {
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/* Note that on some platforms 'timeout' may be modified by select().
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If you need access to the original value save a copy beforehand. */
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rc = select(maxfd + 1, &fdread, &fdwrite, &fdexcep, &timeout);
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}
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switch(rc) {
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case -1:
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/* select error */
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break;
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case 0: /* timeout */
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default: /* action */
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curl_multi_perform(multi_handle, &still_running);
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break;
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}
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}
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switch(rc) {
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case -1:
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/* select error */
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break;
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case 0: /* timeout */
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default: /* action */
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curl_multi_perform(multi_handle, &still_running);
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break;
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}
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}
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/* See how the transfers went */
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/* !checksrc! disable EQUALSNULL 1 */
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while((msg = curl_multi_info_read(multi_handle, &msgs_left)) != NULL) {
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if(msg->msg == CURLMSG_DONE) {
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int idx;
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/* See how the transfers went */
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/* !checksrc! disable EQUALSNULL 1 */
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while((msg = curl_multi_info_read(multi_handle, &msgs_left)) != NULL) {
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if(msg->msg == CURLMSG_DONE) {
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int idx;
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/* Find out which handle this message is about */
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for(idx = 0; idx < HANDLECOUNT; idx++) {
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int found = (msg->easy_handle == handles[idx]);
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if(found)
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break;
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}
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/* Find out which handle this message is about */
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for(idx = 0; idx < HANDLECOUNT; idx++) {
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int found = (msg->easy_handle == handles[idx]);
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if(found)
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switch(idx) {
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case HTTP_HANDLE:
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printf("HTTP transfer completed with status %d\n", msg->data.result);
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break;
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}
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switch(idx) {
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case HTTP_HANDLE:
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printf("HTTP transfer completed with status %d\n", msg->data.result);
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break;
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case FTP_HANDLE:
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printf("FTP transfer completed with status %d\n", msg->data.result);
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break;
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case FTP_HANDLE:
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printf("FTP transfer completed with status %d\n", msg->data.result);
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break;
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}
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}
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}
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}
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curl_multi_cleanup(multi_handle);
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curl_multi_cleanup(multi_handle);
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}
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/* Free the curl handles */
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for(i = 0; i < HANDLECOUNT; i++)
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curl_easy_cleanup(handles[i]);
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curl_global_cleanup();
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curl_global_cleanup();
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return 0;
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}
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