{"id":4919,"date":"2024-03-14T14:08:17","date_gmt":"2024-03-14T05:08:17","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%a7%e3%81%aecurl%e3%83%a9%e3%82%a4%e3%83%96%e3%83%a9%e3%83%aa%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2025-08-03T00:41:03","modified_gmt":"2025-08-02T15:41:03","slug":"c%e3%81%a7%e3%81%aecurl%e3%83%a9%e3%82%a4%e3%83%96%e3%83%a9%e3%83%aa%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e3%81%a7%e3%81%aecurl%e3%83%a9%e3%82%a4%e3%83%96%e3%83%a9%e3%83%aa%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"C++ 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class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;curl\/curl.h&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;iostream&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">size_t<\/span> <span class=\"hljs-title\">writeCallback<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">void<\/span>* contents, <span class=\"hljs-type\">size_t<\/span> size, <span class=\"hljs-type\">size_t<\/span> nmemb, std::string* buffer)<\/span> <\/span>{\r\n    <span class=\"hljs-type\">size_t<\/span> realsize = size * nmemb;\r\n    buffer-&gt;<span class=\"hljs-built_in\">append<\/span>((<span class=\"hljs-type\">char<\/span>*)contents, realsize);\r\n    <span class=\"hljs-keyword\">return<\/span> realsize;\r\n}\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span> <\/span>{\r\n    CURL* curl;\r\n    CURLcode res;\r\n    std::string buffer;\r\n\r\n    curl = <span class=\"hljs-built_in\">curl_easy_init<\/span>();\r\n    <span class=\"hljs-keyword\">if<\/span> (curl) {\r\n        <span class=\"hljs-built_in\">curl_easy_setopt<\/span>(curl, CURLOPT_URL, <span class=\"hljs-string\">\"https:\/\/www.example.com\"<\/span>);\r\n        <span class=\"hljs-built_in\">curl_easy_setopt<\/span>(curl, CURLOPT_WRITEFUNCTION, writeCallback);\r\n        <span class=\"hljs-built_in\">curl_easy_setopt<\/span>(curl, CURLOPT_WRITEDATA, &amp;buffer);\r\n\r\n        res = <span class=\"hljs-built_in\">curl_easy_perform<\/span>(curl);\r\n        <span class=\"hljs-keyword\">if<\/span> (res != CURLE_OK) {\r\n            std::cerr &lt;&lt; <span class=\"hljs-string\">\"curl_easy_perform() failed: \"<\/span> &lt;&lt; <span class=\"hljs-built_in\">curl_easy_strerror<\/span>(res) &lt;&lt; std::endl;\r\n        }\r\n\r\n        <span class=\"hljs-built_in\">curl_easy_cleanup<\/span>(curl);\r\n    }\r\n\r\n    std::cout &lt;&lt; buffer &lt;&lt; std::endl;\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001\u307e\u305acURL\u306e\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3081\u3001\u66f8\u304d\u8fbc\u307f\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570writeCallback\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u6b21\u306b\u3001main\u95a2\u6570\u3067cURL\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u521d\u671f\u5316\u3057\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306eURL\u3001\u66f8\u304d\u8fbc\u307f\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3001\u304a\u3088\u3073\u66f8\u304d\u8fbc\u307f\u30c7\u30fc\u30bf\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u8a2d\u5b9a\u3057\u3001HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b9f\u884c\u3057\u3066\u30ec\u30b9\u30dd\u30f3\u30b9\u3092buffer\u306b\u4fdd\u5b58\u3057\u3001\u6700\u5f8c\u306b\u30ec\u30b9\u30dd\u30f3\u30b9\u5185\u5bb9\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n<p>cURL\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u3001\u5bfe\u5fdc\u3059\u308bcURL\u30e9\u30a4\u30d6\u30e9\u30ea\u30d5\u30a1\u30a4\u30eb\u3092\u30ea\u30f3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u306f-lcurl\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8ffd\u52a0\u3057\u3066cURL\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30ea\u30f3\u30af\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4e0a\u8a18\u306e\u4f8b\u306f\u3001cURL\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306e\u4e00\u4f8b\u3067\u3042\u308a\u3001cURL\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u306f\u3055\u307e\u3056\u307e\u306a\u6a5f\u80fd\u3084\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u3042\u308a\u3001\u7570\u306a\u308b\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u8a2d\u5b9a\u3001POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u9001\u4fe1\u306a\u3069\u304c\u53ef\u80fd\u3067\u3059\u3002\u8a73\u7d30\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3001cURL\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>cURL\uff08\u30ab\u30ec\u30f3\u30c8\u30d5\u30a9\u30fc\u30a2\u30fc\u30eb\uff09\u306f\u3001\u30c7\u30fc\u30bf\u8ee2\u9001\u306e\u305f\u3081\u306e\u30c4\u30fc\u30eb\u3068\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3001HTTP\u3001HTTPS\u3001FTP\u306a\u3069\u306e\u3055\u307e\u3056\u307e\u306a\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002C++\u3067\u306f\u3001cURL\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3057\u3066\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u3092\u884c\u3044\u3001HT 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