libcurl örnek

curl/build.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+gcc -Wall main.c -lcurl

curl/main.c

@@ -0,0 +1,54 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <curl/curl.h>
+
+static size_t write_callback(char *ptr, size_t size, size_t nmemb, void *stream)
+{
+    size_t written = fwrite(ptr, size, nmemb, (FILE *)stream);
+    return written;
+}
+
+int main(void)
+{
+    int ret = EXIT_FAILURE;
+    if (curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
+        fputs("error: curl_global_init failed.\n", stderr);
+        return ret;
+    }
+
+    CURL *curl = curl_easy_init();
+    if (!curl) {
+        fputs("error: curl_easy_init failed.\n", stderr);
+        goto GLOB_CLEAN;
+    }
+
+    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
+
+    /* curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); */
+
+    char const* file_name = "example.html";
+    FILE *stream = fopen(file_name, "w");
+    if (!stream) {
+        fprintf(stderr, "failed to open %s\n", file_name);
+        goto EASY_CLEAN;
+    }
+
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
+    curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)stream);
+
+    CURLcode result = curl_easy_perform(curl);
+    fclose(stream);
+
+    if (result != CURLE_OK) {
+        fprintf(stderr, "error: %s\n", curl_easy_strerror(result));
+        goto EASY_CLEAN;
+    }
+
+    ret = EXIT_SUCCESS;
+
+EASY_CLEAN:
+    curl_easy_cleanup(curl);
+GLOB_CLEAN:
+    curl_global_cleanup();
+    return ret;
+}