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c++ curl

From: will griffiths <willgriffiths1_at_yahoo.co.uk>
Date: Sat, 3 Oct 2009 16:10:39 +0000 (GMT)

Hello, I have written a full text indexing program in C++ and am now building a spidering program and I intend to use libcurl for the download side of things. I am struggling a bit to transfer my curl multi code from PHP to C++ as I relied on the "getcontent" function quite heavily. I have included the full source code below. When i turned verbose on I got this output: * Closing connection #0 * Closing connection #1 * Closing connection #2 followed by a crash. I probably need help understanding how the curl functions work in C++. I have read the docs for the functions "individually" and then strung them together by looking at egs in Google Code Search. Any help appreciated :) Will //#pragma comment(lib, "libcurl.lib") // now appending /link <DIR>\libcurl.lib to cmd args instead #include <string> #include <iostream> #include <map> #include "curl/curl.h" using namespace std; FILE *fd; static size_t getpage(void *incoming, size_t size, size_t nmemb, void *page) { return fwrite(incoming, size, nmemb, (FILE *)page); } int main() { map<int, string> pass; pass[0] = "http://chemrefer.com/index.html"; pass[1] = "http://www.chemrefer.com/chemistry_search.php?page_title=news&submit"; pass[2] = "http://www.chemrefer.com/chemistry_search.php?page_title=toolbar&submit"; pass[3] = "http://www.chemrefer.com/chemistry_search.php?page_title=about&submit"; pass[4] = "http://www.chemrefer.com/chemistry_search.php?page_title=contact&submit"; CURL *h[5]; CURLM *mh; mh = curl_multi_init(); for (int i = 0; i < 5; ++i) { char *urlbuf = new char[pass[i].length()]; strcpy(urlbuf, pass[i].c_str()); h[i] = curl_easy_init(); fd = fopen("download.txt", "ab"); curl_easy_setopt(h[i], CURLOPT_URL, urlbuf); curl_easy_setopt(h[i], CURLOPT_WRITEFUNCTION, getpage); curl_easy_setopt(h[i], CURLOPT_WRITEDATA, fd); curl_easy_setopt(h[i], CURLOPT_HEADER, 0); curl_multi_add_handle(mh, h[i]); delete[] urlbuf; fclose(fd); } pass.clear(); int running; CURLMcode result; do { result = curl_multi_perform(mh, &running); if (result != CURLM_CALL_MULTI_PERFORM) break; } while (running > 0); for (int i = 0; i < 5; ++i) curl_multi_remove_handle(mh, h[i]); for (int i = 0; i < 5; ++i) curl_easy_cleanup(h[i]); curl_multi_cleanup(mh); }

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Received on 2009-10-03

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