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examples: check more errors, fix cleanups, scope variables

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Inspired by Joshua's report on examples.

Closes #19055
This commit is contained in:
Viktor Szakats 2025-10-13 22:57:01 +02:00
parent 61dcb56743
commit 64ed2ea196
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GPG key ID: B5ABD165E2AEF201
42 changed files with 874 additions and 785 deletions
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95
docs/examples/chkspeed.c
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@ -162,62 +162,67 @@ int main(int argc, char *argv[])
/* init the curl session */
curl_handle = curl_easy_init();
if(curl_handle) {
/* specify URL to get */
curl_easy_setopt(curl_handle, CURLOPT_URL, url);
/* specify URL to get */
curl_easy_setopt(curl_handle, CURLOPT_URL, url);
/* send all data to this function */
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteCallback);
/* send all data to this function */
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, WriteCallback);
/* some servers do not like requests that are made without a user-agent
field, so we provide one */
curl_easy_setopt(curl_handle, CURLOPT_USERAGENT,
"libcurl-speedchecker/" CHKSPEED_VERSION);
/* some servers do not like requests that are made without a user-agent
field, so we provide one */
curl_easy_setopt(curl_handle, CURLOPT_USERAGENT,
"libcurl-speedchecker/" CHKSPEED_VERSION);
/* get it! */
res = curl_easy_perform(curl_handle);
/* get it! */
res = curl_easy_perform(curl_handle);
if(CURLE_OK == res) {
curl_off_t val;
if(CURLE_OK == res) {
curl_off_t val;
/* check for bytes downloaded */
res = curl_easy_getinfo(curl_handle, CURLINFO_SIZE_DOWNLOAD_T, &val);
if((CURLE_OK == res) && (val > 0))
printf("Data downloaded: %lu bytes.\n", (unsigned long)val);
/* check for total download time */
res = curl_easy_getinfo(curl_handle, CURLINFO_TOTAL_TIME_T, &val);
if((CURLE_OK == res) && (val > 0))
printf("Total download time: %lu.%06lu sec.\n",
(unsigned long)(val / 1000000), (unsigned long)(val % 1000000));
/* check for average download speed */
res = curl_easy_getinfo(curl_handle, CURLINFO_SPEED_DOWNLOAD_T, &val);
if((CURLE_OK == res) && (val > 0))
printf("Average download speed: %lu kbyte/sec.\n",
(unsigned long)(val / 1024));
if(prtall) {
/* check for name resolution time */
res = curl_easy_getinfo(curl_handle, CURLINFO_NAMELOOKUP_TIME_T, &val);
/* check for bytes downloaded */
res = curl_easy_getinfo(curl_handle, CURLINFO_SIZE_DOWNLOAD_T, &val);
if((CURLE_OK == res) && (val > 0))
printf("Name lookup time: %lu.%06lu sec.\n",
(unsigned long)(val / 1000000), (unsigned long)(val % 1000000));
printf("Data downloaded: %lu bytes.\n", (unsigned long)val);
/* check for connect time */
res = curl_easy_getinfo(curl_handle, CURLINFO_CONNECT_TIME_T, &val);
/* check for total download time */
res = curl_easy_getinfo(curl_handle, CURLINFO_TOTAL_TIME_T, &val);
if((CURLE_OK == res) && (val > 0))
printf("Connect time: %lu.%06lu sec.\n",
(unsigned long)(val / 1000000), (unsigned long)(val % 1000000));
printf("Total download time: %lu.%06lu sec.\n",
(unsigned long)(val / 1000000),
(unsigned long)(val % 1000000));
/* check for average download speed */
res = curl_easy_getinfo(curl_handle, CURLINFO_SPEED_DOWNLOAD_T, &val);
if((CURLE_OK == res) && (val > 0))
printf("Average download speed: %lu kbyte/sec.\n",
(unsigned long)(val / 1024));
if(prtall) {
/* check for name resolution time */
res = curl_easy_getinfo(curl_handle, CURLINFO_NAMELOOKUP_TIME_T, &val);
if((CURLE_OK == res) && (val > 0))
printf("Name lookup time: %lu.%06lu sec.\n",
(unsigned long)(val / 1000000),
(unsigned long)(val % 1000000));
/* check for connect time */
res = curl_easy_getinfo(curl_handle, CURLINFO_CONNECT_TIME_T, &val);
if((CURLE_OK == res) && (val > 0))
printf("Connect time: %lu.%06lu sec.\n",
(unsigned long)(val / 1000000),
(unsigned long)(val % 1000000));
}
}
else {
fprintf(stderr, "Error while fetching '%s' : %s\n",
url, curl_easy_strerror(res));
}
}
else {
fprintf(stderr, "Error while fetching '%s' : %s\n",
url, curl_easy_strerror(res));
}
/* cleanup curl stuff */
curl_easy_cleanup(curl_handle);
/* cleanup curl stuff */
curl_easy_cleanup(curl_handle);
}
/* we are done with libcurl, so clean it up */
curl_global_cleanup();