php中http请求

折叠代码块PHP 复制代码

<?php
function httpRequest($url, $method, $headers, $body=NULL){
    $ch = curl_init();
    
    // 设置请求url
    curl_setopt($ch, CURLOPT_URL, $url);
    // 设置请求方法
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
    // 设置请求体
    switch ($method)  {
        case "POST":
            if ($body != NULL){
                curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
                $bodyLength = strlen($body);
                $headers[] = "content-length： $bodyLength";
            }
        default:
            break;
    }
    // 设置请求头
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    // 返回文件流
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    // 设置数据编码
    curl_setopt($ch, CURLOPT_ENCODING, 'gzip, deflate');
    // 返回响应头，false为不返回
    curl_setopt($ch, CURLOPT_HEADER, TRUE);
    // 返回响应体
    curl_setopt($ch, CURLOPT_NOBODY, FALSE); 
    // 连接结束后保存cookie信息到某个文件。
    // curl_setopt($ch, CURLOPT_COOKIEJAR, "test.cookie");
    // 请求时读取cookie信息的文件
    // curl_setopt($ch, CURLOPT_COOKIEFILE, "test.cookie");
    // 注意，毫秒超时一定要设置这个
    curl_setopt($ch, CURLOPT_NOSIGNAL, 1);
    // 超时毫秒，cURL 7.16.2中被加入。从PHP 5.2.3起可使用
    curl_setopt($ch, CURLOPT_TIMEOUT_MS, 300);
    // 抓取https数据时设置如下两个选项，防止抓取失败
    // curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
    // curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
    // 设置socks5代理
    // curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
    // curl_setopt($ch, CURLOPT_PROXY, PROXY_URL);
    $resp  = curl_exec($ch);
    
    // 获取响应码
    $respStatus = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    // 获取响应头长度
    $respHeaderSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
    // 获取响应头
    $respHeaders = substr($resp, 0, $respHeaderSize);
    // 获取响应体
    $respBody = substr($resp, $respHeaderSize);
    // 错误码为0，则正常
    curl_errno($ch);
    curl_close($ch);
    
    return array(
        "status"=>$respStatus,
        "headers"=> headerStrHandler($respHeaders),
        "body"=>$respBody
    );
}

function headerStrHandler($headerStr) {
    $headerLines = explode("\n", $headerStr);
    $headers = array();
    foreach($headerLines as $headerLine) {
        $header = explode(": ", $headerLine);
        if (count($header) > 1) {
            $headers[trim($header[0])] = trim($header[1]);
        }
    }
    return $headers;
}

// 对于该链接http://localhost:3001/test.php?asdf=sadf&asd1=11#asd
// /test.php?asdf=sadf&asd1=11
// echo  $_SERVER["REQUEST_URI"];
// 所有参数可以这样查看
// var_dump($_SERVER);
$url = "https://www.baidu.com";
$method = $_SERVER["REQUEST_METHOD"];
$headers = array();
foreach (getallheaders() as $key => $value) {
    if (strtolower($key) == "accept") {
        $headers["accept"] =  $value;
    }
    if (strtolower($key) == "content-type") {
        $headers[] = "content-type: $value";
    }
}
$headers[] = "user-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36 UOS";
// 可以直接组装数据
// $body = "wd=hello&type=1";
// 也可以从文件流获取
$body = file_get_contents("php://input");

if ($method == "OPTIONS") {
    http_response_code(200);
    header("access-control-allow-headers: *");
    header("access-control-allow-origin: *");
    header("content-type: text/html");
    die();
}

http_response_code(200);
header("access-control-allow-headers: *");
header("access-control-allow-origin: *");
header("content-type: application/json; charset=utf-8");
$response = httpRequest($url, $method, $headers, $body);

echo $response["body"];

常用函数参考