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原创声明

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项目地址:https://github.com/joshdick/miniProxy

程序代码:

 <?php /* miniProxy - A simple PHP web proxy. <https://github.com/joshdick/miniProxy> Written and maintained by Joshua Dick <http://joshdick.net>. miniProxy is licensed under the GNU GPL v3 <http://www.gnu.org/licenses/gpl.html>. */ /****************************** START CONFIGURATION ******************************/ //To allow proxying any URL, set $whitelistPatterns to an empty array (the default). //To only allow proxying of specific URLs (whitelist), add corresponding regular expressions //to the $whitelistPatterns array. Enter the most specific patterns possible, to prevent possible abuse. //You can optionally use the "getHostnamePattern()" helper function to build a regular expression that //matches all URLs for a given hostname. $whitelistPatterns = array( //Usage example: To support any URL at example.net, including sub-domains, uncomment the //line below (which is equivalent to [ @^https?://([a-z0-9-]+\.)*example\[email protected] ]): //getHostnamePattern("example.net") ); //To enable CORS (cross-origin resource sharing) for proxied sites, set $forceCORS to true. $forceCORS = false; //Set to false to report the client machine's IP address to proxied sites via the HTTP `x-forwarded-for` header. //Setting to false may improve compatibility with some sites, but also exposes more information about end users to proxied sites. $anonymize = true; //Start/default URL that that will be proxied when miniProxy is first loaded in a browser/accessed directly with no URL to proxy. //If empty, miniProxy will show its own landing page. $startURL = ""; //When no $startURL is configured above, miniProxy will show its own landing page with a URL form field //and the configured example URL. The example URL appears in the instructional text on the miniProxy landing page, //and is proxied when pressing the 'Proxy It!' button on the landing page if its URL form is left blank. $landingExampleURL = "https://example.net"; /****************************** END CONFIGURATION ******************************/ ob_start("ob_gzhandler"); if (version_compare(PHP_VERSION, "5.4.7", "<")) { die("miniProxy requires PHP version 5.4.7 or later."); } $requiredExtensions = ["curl", "mbstring", "xml"]; foreach($requiredExtensions as $requiredExtension) { if (!extension_loaded($requiredExtension)) { die("miniProxy requires PHP's \"" . $requiredExtension . "\" extension. Please install/enable it on your server and try again."); } } //Helper function for use inside $whitelistPatterns. //Returns a regex that matches all HTTP[S] URLs for a given hostname. function getHostnamePattern($hostname) { $escapedHostname = str_replace(".", "\.", $hostname); return "@^https?://([a-z0-9-]+\.)*" . $escapedHostname . "@i"; } //Helper function used to removes/unset keys from an associative array using case insensitive matching function removeKeys(&$assoc, $keys2remove) { $keys = array_keys($assoc); $map = array(); $removedKeys = array(); foreach ($keys as $key) { $map[strtolower($key)] = $key; } foreach ($keys2remove as $key) { $key = strtolower($key); if (isset($map[$key])) { unset($assoc[$map[$key]]); $removedKeys[] = $map[$key]; } } return $removedKeys; } if (!function_exists("getallheaders")) { //Adapted from http://www.php.net/manual/en/function.getallheaders.php#99814 function getallheaders() { $result = array(); foreach($_SERVER as $key => $value) { if (substr($key, 0, 5) == "HTTP_") { $key = str_replace(" ", "-", ucwords(strtolower(str_replace("_", " ", substr($key, 5))))); $result[$key] = $value; } } return $result; } } $usingDefaultPort = (!isset($_SERVER["HTTPS"]) && $_SERVER["SERVER_PORT"] === 80) || (isset($_SERVER["HTTPS"]) && $_SERVER["SERVER_PORT"] === 443); $prefixPort = $usingDefaultPort ? "" : ":" . $_SERVER["SERVER_PORT"]; //Use HTTP_HOST to support client-configured DNS (instead of SERVER_NAME), but remove the port if one is present $prefixHost = $_SERVER["HTTP_HOST"]; $prefixHost = strpos($prefixHost, ":") ? implode(":", explode(":", $_SERVER["HTTP_HOST"], -1)) : $prefixHost; define("PROXY_PREFIX", "http" . (isset($_SERVER["HTTPS"]) ? "s" : "") . "://" . $prefixHost . $prefixPort . $_SERVER["SCRIPT_NAME"] . "?"); //Makes an HTTP request via cURL, using request data that was passed directly to this script. function makeRequest($url) { global $anonymize; //Tell cURL to make the request using the brower's user-agent if there is one, or a fallback user-agent otherwise. $user_agent = $_SERVER["HTTP_USER_AGENT"]; if (empty($user_agent)) { $user_agent = "Mozilla/5.0 (compatible; miniProxy)"; } $ch = curl_init(); curl_setopt($ch, CURLOPT_USERAGENT, $user_agent); //Get ready to proxy the browser's request headers... $browserRequestHeaders = getallheaders(); //...but let cURL set some headers on its own. $removedHeaders = removeKeys($browserRequestHeaders, array( "Accept-Encoding", //Throw away the browser's Accept-Encoding header if any and let cURL make the request using gzip if possible. "Content-Length", "Host", "Origin" )); $removedHeaders = array_map("strtolower", $removedHeaders); curl_setopt($ch, CURLOPT_ENCODING, ""); //Transform the associative array from getallheaders() into an //indexed array of header strings to be passed to cURL. $curlRequestHeaders = array(); foreach ($browserRequestHeaders as $name => $value) { $curlRequestHeaders[] = $name . ": " . $value; } if (!$anonymize) { $curlRequestHeaders[] = "X-Forwarded-For: " . $_SERVER["REMOTE_ADDR"]; } //Any `origin` header sent by the browser will refer to the proxy itself. //If an `origin` header is present in the request, rewrite it to point to the correct origin. if (in_array("origin", $removedHeaders)) { $urlParts = parse_url($url); $port = $urlParts["port"]; $curlRequestHeaders[] = "Origin: " . $urlParts["scheme"] . "://" . $urlParts["host"] . (empty($port) ? "" : ":" . $port); }; curl_setopt($ch, CURLOPT_HTTPHEADER, $curlRequestHeaders); //Proxy any received GET/POST/PUT data. switch ($_SERVER["REQUEST_METHOD"]) { case "POST": curl_setopt($ch, CURLOPT_POST, true); //For some reason, $HTTP_RAW_POST_DATA isn't working as documented at //http://php.net/manual/en/reserved.variables.httprawpostdata.php //but the php://input method works. This is likely to be flaky //across different server environments. //More info here: http://stackoverflow.com/questions/8899239/http-raw-post-data-not-being-populated-after-upgrade-to-php-5-3 //If the miniProxyFormAction field appears in the POST data, remove it so the destination server doesn't receive it. $postData = Array(); parse_str(file_get_contents("php://input"), $postData); if (isset($postData["miniProxyFormAction"])) { unset($postData["miniProxyFormAction"]); } curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($postData)); break; case "PUT": curl_setopt($ch, CURLOPT_PUT, true); curl_setopt($ch, CURLOPT_INFILE, fopen("php://input", "r")); break; } //Other cURL options. curl_setopt($ch, CURLOPT_HEADER, true); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //Set the request URL. curl_setopt($ch, CURLOPT_URL, $url); //Make the request. $response = curl_exec($ch); $responseInfo = curl_getinfo($ch); $headerSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE); curl_close($ch); //Setting CURLOPT_HEADER to true above forces the response headers and body //to be output together--separate them. $responseHeaders = substr($response, 0, $headerSize); $responseBody = substr($response, $headerSize); return array("headers" => $responseHeaders, "body" => $responseBody, "responseInfo" => $responseInfo); } //Converts relative URLs to absolute ones, given a base URL. //Modified version of code found at http://nashruddin.com/PHP_Script_for_Converting_Relative_to_Absolute_URL function rel2abs($rel, $base) { if (empty($rel)) $rel = "."; if (parse_url($rel, PHP_URL_SCHEME) != "" || strpos($rel, "//") === 0) return $rel; //Return if already an absolute URL if ($rel[0] == "#" || $rel[0] == "?") return $base.$rel; //Queries and anchors extract(parse_url($base)); //Parse base URL and convert to local variables: $scheme, $host, $path $path = isset($path) ? preg_replace("#/[^/]*$#", "", $path) : "/"; //Remove non-directory element from path if ($rel[0] == "/") $path = ""; //Destroy path if relative url points to root $port = isset($port) && $port != 80 ? ":" . $port : ""; $auth = ""; if (isset($user)) { $auth = $user; if (isset($pass)) { $auth .= ":" . $pass; } $auth .= "@"; } $abs = "$auth$host$port$path/$rel"; //Dirty absolute URL for ($n = 1; $n > 0; $abs = preg_replace(array("#(/\.?/)#", "#/(?!\.\.)[^/]+/\.\./#"), "/", $abs, -1, $n)) {} //Replace '//' or '/./' or '/foo/../' with '/' return $scheme . "://" . $abs; //Absolute URL is ready. } //Proxify contents of url() references in blocks of CSS text. function proxifyCSS($css, $baseURL) { // Add a "url()" wrapper to any CSS @import rules that only specify a URL without the wrapper, // so that they're proxified when searching for "url()" wrappers below. $sourceLines = explode("\n", $css); $normalizedLines = []; foreach ($sourceLines as $line) { if (preg_match("/@import\s+url/i", $line)) { $normalizedLines[] = $line; } else { $normalizedLines[] = preg_replace_callback( "/(@import\s+)([^;\s]+)([\s;])/i", function($matches) use ($baseURL) { return $matches[1] . "url(" . $matches[2] . ")" . $matches[3]; }, $line); } } $normalizedCSS = implode("\n", $normalizedLines); return preg_replace_callback( "/url\((.*?)\)/i", function($matches) use ($baseURL) { $url = $matches[1]; //Remove any surrounding single or double quotes from the URL so it can be passed to rel2abs - the quotes are optional in CSS //Assume that if there is a leading quote then there should be a trailing quote, so just use trim() to remove them if (strpos($url, "'") === 0) { $url = trim($url, "'"); } if (strpos($url, "\"") === 0) { $url = trim($url, "\""); } if (stripos($url, "data:") === 0) return "url(" . $url . ")"; //The URL isn't an HTTP URL but is actual binary data. Don't proxify it. return "url(" . PROXY_PREFIX . rel2abs($url, $baseURL) . ")"; }, $normalizedCSS); } //Proxify "srcset" attributes (normally associated with <img> tags.) function proxifySrcset($srcset, $baseURL) { $sources = array_map("trim", explode(",", $srcset)); //Split all contents by comma and trim each value $proxifiedSources = array_map(function($source) use ($baseURL) { $components = array_map("trim", str_split($source, strrpos($source, " "))); //Split by last space and trim $components[0] = PROXY_PREFIX . rel2abs(ltrim($components[0], "/"), $baseURL); //First component of the split source string should be an image URL; proxify it return implode($components, " "); //Recombine the components into a single source }, $sources); $proxifiedSrcset = implode(", ", $proxifiedSources); //Recombine the sources into a single "srcset" return $proxifiedSrcset; } //Extract and sanitize the requested URL, handling cases where forms have been rewritten to point to the proxy. if (isset($_POST["miniProxyFormAction"])) { $url = $_POST["miniProxyFormAction"]; unset($_POST["miniProxyFormAction"]); } else { $queryParams = Array(); parse_str($_SERVER["QUERY_STRING"], $queryParams); //If the miniProxyFormAction field appears in the query string, make $url start with its value, and rebuild the the query string without it. if (isset($queryParams["miniProxyFormAction"])) { $formAction = $queryParams["miniProxyFormAction"]; unset($queryParams["miniProxyFormAction"]); $url = $formAction . "?" . http_build_query($queryParams); } else { $url = substr($_SERVER["REQUEST_URI"], strlen($_SERVER["SCRIPT_NAME"]) + 1); } } if (empty($url)) { if (empty($startURL)) { die("<html><head><title>miniProxy</title></head><body><h1>Welcome to miniProxy!</h1>miniProxy can be directly invoked like this: <a href=\"" . PROXY_PREFIX . $landingExampleURL . "\">" . PROXY_PREFIX . $landingExampleURL . "</a><br /><br />Or, you can simply enter a URL below:<br /><br /><form onsubmit=\"if (document.getElementById('site').value) { window.location.href='" . PROXY_PREFIX . "' + document.getElementById('site').value; return false; } else { window.location.href='" . PROXY_PREFIX . $landingExampleURL . "'; return false; }\" autocomplete=\"off\"><input id=\"site\" type=\"text\" size=\"50\" /><input type=\"submit\" value=\"Proxy It!\" /></form></body></html>"); } else { $url = $startURL; } } else if (strpos($url, ":/") !== strpos($url, "://")) { //Work around the fact that some web servers (e.g. IIS 8.5) change double slashes appearing in the URL to a single slash. //See https://github.com/joshdick/miniProxy/pull/14 $pos = strpos($url, ":/"); $url = substr_replace($url, "://", $pos, strlen(":/")); } $scheme = parse_url($url, PHP_URL_SCHEME); if (empty($scheme)) { //Assume that any supplied URLs starting with // are HTTP URLs. if (strpos($url, "//") === 0) { $url = "http:" . $url; } } else if (!preg_match("/^https?$/i", $scheme)) { die('Error: Detected a "' . $scheme . '" URL. miniProxy exclusively supports http[s] URLs.'); } //Validate the requested URL against the whitelist. $urlIsValid = count($whitelistPatterns) === 0; foreach ($whitelistPatterns as $pattern) { if (preg_match($pattern, $url)) { $urlIsValid = true; break; } } if (!$urlIsValid) { die("Error: The requested URL was disallowed by the server administrator."); } $response = makeRequest($url); $rawResponseHeaders = $response["headers"]; $responseBody = $response["body"]; $responseInfo = $response["responseInfo"]; //If CURLOPT_FOLLOWLOCATION landed the proxy at a diferent URL than //what was requested, explicitly redirect the proxy there. $responseURL = $responseInfo["url"]; if ($responseURL !== $url) { header("Location: " . PROXY_PREFIX . $responseURL, true); exit(0); } //A regex that indicates which server response headers should be stripped out of the proxified response. $header_blacklist_pattern = "/^Content-Length|^Transfer-Encoding|^Content-Encoding.*gzip/i"; //cURL can make multiple requests internally (for example, if CURLOPT_FOLLOWLOCATION is enabled), and reports //headers for every request it makes. Only proxy the last set of received response headers, //corresponding to the final request made by cURL for any given call to makeRequest(). $responseHeaderBlocks = array_filter(explode("\r\n\r\n", $rawResponseHeaders)); $lastHeaderBlock = end($responseHeaderBlocks); $headerLines = explode("\r\n", $lastHeaderBlock); foreach ($headerLines as $header) { $header = trim($header); if (!preg_match($header_blacklist_pattern, $header)) { header($header, false); } } //Prevent robots from indexing proxified pages header("X-Robots-Tag: noindex, nofollow", true); if ($forceCORS) { //This logic is based on code found at: http://stackoverflow.com/a/9866124/278810 //CORS headers sent below may conflict with CORS headers from the original response, //so these headers are sent after the original response headers to ensure their values //are the ones that actually end up getting sent to the browser. //Explicit [ $replace = true ] is used for these headers even though this is PHP's default behavior. //Allow access from any origin. header("Access-Control-Allow-Origin: *", true); header("Access-Control-Allow-Credentials: true", true); //Handle CORS headers received during OPTIONS requests. if ($_SERVER["REQUEST_METHOD"] == "OPTIONS") { if (isset($_SERVER["HTTP_ACCESS_CONTROL_REQUEST_METHOD"])) { header("Access-Control-Allow-Methods: GET, POST, OPTIONS", true); } if (isset($_SERVER["HTTP_ACCESS_CONTROL_REQUEST_HEADERS"])) { header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}", true); } //No further action is needed for OPTIONS requests. exit(0); } } $contentType = ""; if (isset($responseInfo["content_type"])) $contentType = $responseInfo["content_type"]; //This is presumably a web page, so attempt to proxify the DOM. if (stripos($contentType, "text/html") !== false) { //Attempt to normalize character encoding. $detectedEncoding = mb_detect_encoding($responseBody,array('ASCII','UTF-8','GB2312','GBK','BIG5')); if ($detectedEncoding) { $responseBody = mb_convert_encoding($responseBody, "HTML-ENTITIES", $detectedEncoding); } //Parse the DOM. $doc = new DomDocument(); @$doc->loadHTML($responseBody); $xpath = new DOMXPath($doc); //Rewrite forms so that their actions point back to the proxy. foreach($xpath->query("//form") as $form) { $method = $form->getAttribute("method"); $action = $form->getAttribute("action"); //If the form doesn't have an action, the action is the page itself. //Otherwise, change an existing action to an absolute version. $action = empty($action) ? $url : rel2abs($action, $url); //Rewrite the form action to point back at the proxy. $form->setAttribute("action", rtrim(PROXY_PREFIX, "?")); //Add a hidden form field that the proxy can later use to retreive the original form action. $actionInput = $doc->createDocumentFragment(); $actionInput->appendXML('<input type="hidden" name="miniProxyFormAction" value="' . htmlspecialchars($action) . '" />'); $form->appendChild($actionInput); } //Proxify <meta> tags with an 'http-equiv="refresh"' attribute. foreach ($xpath->query("//meta[@http-equiv]") as $element) { if (strcasecmp($element->getAttribute("http-equiv"), "refresh") === 0) { $content = $element->getAttribute("content"); if (!empty($content)) { $splitContent = preg_split("/=/", $content); if (isset($splitContent[1])) { $element->setAttribute("content", $splitContent[0] . "=" . PROXY_PREFIX . rel2abs($splitContent[1], $url)); } } }else if (strcasecmp($element->getAttribute("http-equiv"), "Content-Type") === 0) { $contenttype = $element->getAttribute("content"); $doc->encoding = $detectedEncoding; header("Content-Type: $contenttype"); } } //Profixy <style> tags. foreach($xpath->query("//style") as $style) { $style->nodeValue = proxifyCSS($style->nodeValue, $url); } //Proxify tags with a "style" attribute. foreach ($xpath->query("//*[@style]") as $element) { $element->setAttribute("style", proxifyCSS($element->getAttribute("style"), $url)); } //Proxify "srcset" attributes in <img> tags. foreach ($xpath->query("//img[@srcset]") as $element) { $element->setAttribute("srcset", proxifySrcset($element->getAttribute("srcset"), $url)); } //Proxify any of these attributes appearing in any tag. $proxifyAttributes = array("href", "src"); foreach($proxifyAttributes as $attrName) { foreach($xpath->query("//*[@" . $attrName . "]") as $element) { //For every element with the given attribute... $attrContent = $element->getAttribute($attrName); if ($attrName == "href" && preg_match("/^(about|javascript|magnet|mailto):|#/i", $attrContent)) continue; if ($attrName == "src" && preg_match("/^(data):/i", $attrContent)) continue; $attrContent = rel2abs($attrContent, $url); $attrContent = PROXY_PREFIX . $attrContent; $element->setAttribute($attrName, $attrContent); } } //Attempt to force AJAX requests to be made through the proxy by //wrapping window.XMLHttpRequest.prototype.open in order to make //all request URLs absolute and point back to the proxy. //The rel2abs() JavaScript function serves the same purpose as the server-side one in this file, //but is used in the browser to ensure all AJAX request URLs are absolute and not relative. //Uses code from these sources: //http://stackoverflow.com/questions/7775767/javascript-overriding-xmlhttprequest-open //https://gist.github.com/1088850 //TODO: This is obviously only useful for browsers that use XMLHttpRequest but //it's better than nothing. $head = $xpath->query("//head")->item(0); $body = $xpath->query("//body")->item(0); $prependElem = $head != null ? $head : $body; //Only bother trying to apply this hack if the DOM has a <head> or <body> element; //insert some JavaScript at the top of whichever is available first. //Protects against cases where the server sends a Content-Type of "text/html" when //what's coming back is most likely not actually HTML. //TODO: Do this check before attempting to do any sort of DOM parsing? if ($prependElem != null) { $scriptElem = $doc->createElement("script", '(function() { if (window.XMLHttpRequest) { function parseURI(url) { var m = String(url).replace(/^\s+|\s+$/g, "").match(/^([^:\/?#]+:)?(\/\/(?:[^:@]*(?::[^:@]*)[email protected])?(([^:\/?#]*)(?::(\d*))?))?([^?#]*)(\?[^#]*)?(#[\s\S]*)?/); // authority = "//" + user + ":" + pass "@" + hostname + ":" port return (m ? { href : m[0] || "", protocol : m[1] || "", authority: m[2] || "", host : m[3] || "", hostname : m[4] || "", port : m[5] || "", pathname : m[6] || "", search : m[7] || "", hash : m[8] || "" } : null); } function rel2abs(base, href) { // RFC 3986 function removeDotSegments(input) { var output = []; input.replace(/^(\.\.?(\/|$))+/, "") .replace(/\/(\.(\/|$))+/g, "/") .replace(/\/\.\.$/, "/../") .replace(/\/?[^\/]*/g, function (p) { if (p === "/..") { output.pop(); } else { output.push(p); } }); return output.join("").replace(/^\//, input.charAt(0) === "/" ? "/" : ""); } href = parseURI(href || ""); base = parseURI(base || ""); return !href || !base ? null : (href.protocol || base.protocol) + (href.protocol || href.authority ? href.authority : base.authority) + removeDotSegments(href.protocol || href.authority || href.pathname.charAt(0) === "/" ? href.pathname : (href.pathname ? ((base.authority && !base.pathname ? "/" : "") + base.pathname.slice(0, base.pathname.lastIndexOf("/") + 1) + href.pathname) : base.pathname)) + (href.protocol || href.authority || href.pathname ? href.search : (href.search || base.search)) + href.hash; } var proxied = window.XMLHttpRequest.prototype.open; window.XMLHttpRequest.prototype.open = function() { if (arguments[1] !== null && arguments[1] !== undefined) { var url = arguments[1]; url = rel2abs("' . $url . '", url); if (url.indexOf("' . PROXY_PREFIX . '") == -1) { url = "' . PROXY_PREFIX . '" + url; } arguments[1] = url; } return proxied.apply(this, [].slice.call(arguments)); }; } })();' ); $scriptElem->setAttribute("type", "text/javascript"); $prependElem->insertBefore($scriptElem, $prependElem->firstChild); } echo "<!-- Proxified page constructed by miniProxy -->\n" . $doc->saveHTML(); } else if (stripos($contentType, "text/css") !== false) { //This is CSS, so proxify url() references. echo proxifyCSS($responseBody, $url); } else { //This isn't a web page or CSS, so serve unmodified through the proxy with the correct headers (images, JavaScript, etc.) header("Content-Length: " . strlen($responseBody), true); echo $responseBody; } ?>

什么?你觉得我是抄别人的吗?naive!要不然我是不会打原创标签的

里面我改进了2处地方

其中

 $detectedEncoding = mb_detect_encoding($responseBody, "UTF-8, ISO-8859-1");

被我改成了

$detectedEncoding = mb_detect_encoding($responseBody,array('ASCII','UTF-8','GB2312','GBK','BIG5'));

这样可以支持更多的字符编码

 foreach ($xpath->query("//meta[@http-equiv]") as $element) { if (strcasecmp($element->getAttribute("http-equiv"), "refresh") === 0) { $content = $element->getAttribute("content"); if (!empty($content)) { $splitContent = preg_split("/=/", $content); if (isset($splitContent[1])) { $element->setAttribute("content", $splitContent[0] . "=" . PROXY_PREFIX . rel2abs($splitContent[1], $url)); } } } }

被我添加了一处else if,改成了

 foreach ($xpath->query("//meta[@http-equiv]") as $element) { if (strcasecmp($element->getAttribute("http-equiv"), "refresh") === 0) { $content = $element->getAttribute("content"); if (!empty($content)) { $splitContent = preg_split("/=/", $content); if (isset($splitContent[1])) { $element->setAttribute("content", $splitContent[0] . "=" . PROXY_PREFIX . rel2abs($splitContent[1], $url)); } } }else if (strcasecmp($element->getAttribute("http-equiv"), "Content-Type") === 0) { $contenttype = $element->getAttribute("content"); $doc->encoding = $detectedEncoding; header("Content-Type: $contenttype"); } }

这样可以获取meta标签里的编码,用协议头的方式输出,解决了部分网页的中文乱码问题。

运行效果:

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