libcurl 을 이용하여 웹페이지 긁어오기
2015-05-28
MingW용 libcurl을 빌드후에.. http 페이지 긁어오는 걸 테스트해 봄..
static 빌드시에.. curl.h 파일 include 전에 CURL_STATICLIB define 필요.
#include <stdlib.h> #include <stdio.h> #define CURL_STATICLIB #include <curl/curl.h> struct url_data { size_t size; char* data; }; size_t write_data(void *ptr, size_t size, size_t nmemb, struct url_data *data) { size_t index = data->size; size_t n = (size * nmemb); char* tmp; data->size += (size * nmemb); #ifdef DEBUG fprintf(stderr, "data at %p size=%ld nmemb=%ld\n", ptr, size, nmemb); #endif tmp = realloc(data->data, data->size + 1); /* +1 for '\0' */ if(tmp) { data->data = tmp; } else { if(data->data) { free(data->data); } fprintf(stderr, "Failed to allocate memory.\n"); return 0; } memcpy((data->data + index), ptr, n); data->data[data->size] = '\0'; return size * nmemb; } char *handle_url(char* url) { CURL *curl; struct url_data data; data.size = 0; data.data = malloc(4096); /* reasonable size initial buffer */ if(NULL == data.data) { fprintf(stderr, "Failed to allocate memory.\n"); return NULL; } data.data[0] = '\0'; CURLcode res; curl = curl_easy_init(); if (curl) { curl_easy_setopt(curl, CURLOPT_URL, url); curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data); curl_easy_setopt(curl, CURLOPT_WRITEDATA, &data); res = curl_easy_perform(curl); if(res != CURLE_OK) { fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res)); } curl_easy_cleanup(curl); } return data.data; } int main(int argc, char* argv[]) { char* data; data = handle_url("http://www.findip.kr"); if(data) { printf("%s\n", data); free(data); } return 0; }
$ gcc http.c -o http.exe -I/workspace/ETC/tclpackages/3rdparty/lib/curl-7.42.1/release/win32/include -L/workspace/ETC/tclpackages/3rdparty/lib/libssh2-1.4.4-20140926/release/win32/lib -L/workspace/ETC/tclpackages/3rdparty/lib/curl-7.42.1/release/win32/lib -L/workspace/ETC/tclpackages/3rdparty/lib/openssl-1.0.2a/release/win32/lib -lcurl -lws2_32 -lcrypt32 -lssh2 -lssl -lcrypto -lws2_32 -lgdi32 -lcrypt32 -lwldap32 /workspace/ETC/tclpackages/3rdparty/lib/zlib-1.2.8/release/win32/lib/libz.a
Categorized as: Programming
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