c练习总结
mmxcq@mmxcq-laptop:~/c/curl$ gcc -o q q.c
/tmp/ccyOh5HP.o: In function `main':
q.c:(.text+0x103): undefined reference to `curl_easy_init'
q.c:(.text+0x148): undefined reference to `curl_easy_setopt'
q.c:(.text+0x16c): undefined reference to `curl_easy_setopt'
q.c:(.text+0x190): undefined reference to `curl_easy_setopt'
q.c:(.text+0x19c): undefined reference to `curl_easy_perform'
q.c:(.text+0x1dc): undefined reference to `curl_easy_cleanup'
collect2: ld returned 1 exit status
gcc libcurl的时候出现这个 原来是没加curl路径
gcc -l curl -o q q.c 就可以了
将header和body分开存储到文件中
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <curl/curl.h>
static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
{
int written = fwrite(ptr, size, nmemb, (FILE *)stream);
return written;
}
int main(void)
{
CURL *curl_handle;
static const char *headerfilename = "head.out";
FILE *headerfile;
static const char *bodyfilename = "body.out";
FILE *bodyfile;
curl_global_init(CURL_GLOBAL_ALL);
/* init the curl session */
curl_handle = curl_easy_init();
/* set URL to get */
curl_easy_setopt(curl_handle, CURLOPT_URL, "http://www.baidu.com");
/* no progress meter please */
curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1L);
/* send all data to this function */
curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_data);
/* open the files */
headerfile = fopen(headerfilename,"w");
if (headerfile == NULL) {
curl_easy_cleanup(curl_handle);
return -1;
}
bodyfile = fopen(bodyfilename,"w");
if (bodyfile == NULL) {
curl_easy_cleanup(curl_handle);
return -1;
}
/* we want the headers to this file handle */
curl_easy_setopt(curl_handle, CURLOPT_WRITEHEADER, headerfile);
curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, bodyfile);
/*
* Notice here that if you want the actual data sent anywhere else but
* stdout, you should consider using the CURLOPT_WRITEDATA option. */
/* get it! */
curl_easy_perform(curl_handle);
/* close the header file */
fclose(headerfile);
/* close the header file */
fclose(bodyfile);
/* cleanup curl stuff */
curl_easy_cleanup(curl_handle);
return 0;
}