LibCURL 简易使用
本文基于Code::Block + Mingw ,参考http://blog.163.com/xu_chao2000/blog/static/27770610200801303252802/
1） 从http://curl.haxx.se/download.html 下载源代码，解压
- 打开命令行，执行Mingw目录下的mingwvars.bat。
3）进入curl的lib目录，执行以下命令：mingw32-make -f Makefile.m32 ，会生成libcurl.dll 以及 libcurldll.a，（默认是动态库配置）
- COPY相应文件到CodeBlock建立的应用程序目录
5）代码如下：
主要代码块
1: int main()
2: {
3: CURL *curl_handle=NULL;
4: CURLcode code;
5: string buffer;
6: //原始的是CURL_GLOBAL_ALL ，还没研究出区别
7: curl_global_init(CURL_GLOBAL_DEFAULT);
8: char* url="www.google.com";
9: if (!init(curl_handle,url,&buffer ))
10: {
11: fprintf(stderr, "Connection initializion failedn");
12: exit(EXIT_FAILURE);
13: }
14: code = curl_easy_perform(curl_handle);
15: if (code != CURLE_OK)
16: {
17: fprintf(stderr, "Failed to get '%s' [%s]n", url, errorBuffer);
18: exit(EXIT_FAILURE);
19: }
20: curl_easy_cleanup(curl_handle);
21: printf("%sn",buffer.c_str());
22: }
23:
24: static bool init(CURL *&conn, char *url,string *p_buffer)
25: {
26: CURLcode code;
27: conn = curl_easy_init();
28: if (conn == NULL)
29: {
30: fprintf(stderr, "Failed to create CURL connectionn");
31: exit(EXIT_FAILURE);
32: }
33: code = curl_easy_setopt(conn, CURLOPT_ERRORBUFFER, errorBuffer);
34: if (code != CURLE_OK)
35: {
36: fprintf(stderr, "Failed to set error buffer [%d]n", code);
37: return false;
38: }
39: code = curl_easy_setopt(conn, CURLOPT_URL, url);
40: if (code != CURLE_OK)
41: {
42: fprintf(stderr, "Failed to set URL [%s]n", errorBuffer);
43: return false;
44: }
45: code = curl_easy_setopt(conn, CURLOPT_FOLLOWLOCATION, 1);
46: if (code != CURLE_OK)
47: {
48: fprintf(stderr, "Failed to set redirect option [%s]n", errorBuffer);
49: return false;
50: }
51: code = curl_easy_setopt(conn, CURLOPT_WRITEFUNCTION, writer);
52: if (code != CURLE_OK)
53: {
54: fprintf(stderr, "Failed to set writer [%s]n", errorBuffer);
55: return false;
56: }
57: code = curl_easy_setopt(conn, CURLOPT_WRITEDATA, p_buffer);
58: if (code != CURLE_OK)
59: {
60: fprintf(stderr, "Failed to set write data [%s]n", errorBuffer);
61: return false;
62: }
63: return true;
64: }
65:
66: static int writer(char *data, size_t size, size_t nmemb, string *writerData)
67: {
68: unsigned long sizes = size * nmemb;
69: if (writerData == NULL) return 0;
70: writerData->append(data, sizes);
71: return sizes;
72: }