PHP 有没有办法在找到字符串匹配后停止curl 请求？

Question

我目前有一个 PHP 脚本，可以下载网站的 html，然后在结果preg_match上运行curl_exec()。该网页大小约为 2 Mb，并且匹配字符串通常位于页面开头，因此大量的下载时间似乎是不必要的。我想知道是否有办法在找到字符串后终止卷曲会话。管道有用吗？我也愿意尝试其他框架，例如 BASH 和 Javascript。谢谢。

Answer 1

在 PHP 中，您可以使用fsockopen，然后在匹配后尽早跳出循环：<?php$host = "stackoverflow.com";$page = "/questions/62504744/is-there-a-way-in-php-to-stop-a-curl-request-once-a-string-match-is-found/62505031";$fp = fsockopen("ssl://$host", 443, $errno, $errdesc);if (!$fp)    die("Couldn't connect to $host:\nError: $errno\nDesc: $errdesc\n");    stream_set_blocking($fp, 0);$request = "GET $page HTTP/1.1\r\n";$request .= "Host: $host\r\n";$request .= "User-Agent: Mozilla/5.0\r\n";$request .= "Accept: text/xml,application/xml,application/xhtml+xml,";$request .= "text/html;q=0.9,text/plain;q=0.8,video/x-mng,image/png,";$request .= "image/jpeg,image/gif;q=0.2,text/css,*/*;q=0.1\r\n\r\n";fputs ($fp, $request);$content = '';while (!feof($fp)) {    $body = fgets($fp);    if (stristr($body, "PHP script that downloads a website's html")) {        echo 'Was found';        $content = $body;        break;    }}fclose($fp);echo $content;或者，如果你想使用nodejs，你也可以这样做。const https = require("https");const req = https.request({  host: "stackoverflow.com",  port: 443,  path:    "/questions/62504744/is-there-a-way-in-php-to-stop-a-curl-request-once-a-string-match-is-found"}, function(res) {  let found = false;  res.on("data", function(chunk) {    // change PHP script... to DOCTYPE, which will show it aborts after first chunk    if (chunk.includes("PHP script that downloads a website's html")) {      found = true;      req.abort();    }    console.log(chunk);  });  res.on("end", () => console.log(found));});req.end();编辑：用匹配的字符串做一些事情。const https = require("https");// callback function when a match is foundfunction doSomthing(str){  console.log('matched partial dom:', str)}const req = https.request({  host: "stackoverflow.com",  port: 443,  path:    "/questions/62504744/is-there-a-way-in-php-to-stop-a-curl-request-once-a-string-match-is-found"}, function(res) {  let body = ''  res.on("data", function(chunk) {    // change PHP script... to DOCTYPE, which will show it aborts after first chunk    if (chunk.includes("PHP script that downloads a website's html")) {      body = chunk.toString();      req.abort();    }  });  res.on("end", () => doSomthing(body));});req.end();