我知道滚动你自己的HTTP缓存可能是不明智的，但这是在项目中使用的。它似乎缓存了一个奇怪的响应，见下文，因为此请求是针对图像的。它似乎是一个非错误响应（否则它不会被缓存），但它不是图像，它是一个HTML页面。除了200之外，哪些响应代码可以被解释为单位成功？
IEnumerator ReallyDownloadFile(string url, string filename, System.Action<string> on_complete,System.Action<string> on_error, bool allow_caching)
{
WWW www = new WWW (url);
yield return www;
if ((www.error != "")&&(www.error != null)) {
on_error.Invoke (www.error);
} else {
System.IO.File.WriteAllBytes (Application.persistentDataPath + "/filecache/" + filename, www.bytes);
on_complete.Invoke (Application.persistentDataPath + "/filecache/" + filename);
}
}
这是回应。我不知道这是从哪里来的。路由器？ CDN可能。你能解释一下发生了什么吗？
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="csrf_token" content="2qe6UtbjdrA6e4ol/eNeo5988K4uoH7r"/>
<meta name="csrf_token" content="UHQ2/wbKRgNdaE14EMIHbKUsa2bLJurm"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv='Pragma' content='no-cache'/>
<script type="text/javascript">
/*
JQuery is not compatible with PSP & NDSi
script execution will stop when the jquery import.
we should put the following script before the jquery is imported
*/
var hardwarePlatform = navigator.platform.toLowerCase();
var agent = navigator.userAgent.toLowerCase();
var isPsp = (agent.indexOf("playstation") != -1);
var isNdsi = (agent.indexOf("nintendo dsi") != -1);
if (isPsp || isNdsi) {
window.location.href = "notsupported.html";
}
</script>
<script type="text/javascript" src="../lib/jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="../lib/log4javascript_lite.js"></script>
<script type="text/javascript" src="../js/redirect.js"></script>
<title></title>
<script type="text/javascript">
var DEFAULT_GATEWAY_IP = "192.168.1.1";
var DEFAULT_GATEWAY_DOMAIN = new Array();
var GATEWAY_DOMAIN = new Array();
var AJAX_HEADER = '../';
var AJAX_TAIL = '';
var AJAX_TIMEOUT = 30000;
var MACRO_NO_SIM_CARD = '255';
var MACRO_CPIN_FAIL = '256';
var MACRO_PIN_READY = '257';
var MACRO_PIN_DISABLE = '258';
var MACRO_PIN_VALIDATE = '259';
var MACRO_PIN_REQUIRED = '260';
var MACRO_PUK_REQUIRED = '261';
var log = log4javascript.getNullLogger();
var hardwarePlatform = navigator.platform.toLowerCase();
var agent = navigator.userAgent.toLowerCase();
var isIpod = hardwarePlatform.indexOf("ipod") != -1;
var isIphone = hardwarePlatform.indexOf("iphone") != -1;
var isIpad = hardwarePlatform.indexOf("ipad") != -1;
var isAndroid = agent.indexOf("android") !=-1;
log.debug("INDEX : hardwarePlatform = " + hardwarePlatform);
log.debug("INDEX : agent = " + agent);
function gotoPageWithoutHistory(url) {
log.debug('MAIN : gotoPageWithoutHistory(' + url + ')');
window.location.replace(url);
}
// internal use only
function _recursiveXml2Object($xml) {
if ($xml.children().size() > 0) {
var _obj = {};
$xml.children().each(function() {
var _childObj = ($(this).children().size() > 0) ? _recursiveXml2Object($(this)) : $(this).text();
if ($(this).siblings().size() > 0 && $(this).siblings().get(0).tagName == this.tagName) {
if (_obj[this.tagName] == null) {
_obj[this.tagName] = [];
}
_obj[this.tagName].push(_childObj);
}
else {
_obj[this.tagName] = _childObj;
}
});
return _obj;
}
else {
return $xml.text();
}
}
// convert XML string to an Object.
// $xml, which is an jQuery xml object.
function xml2object($xml) {
var obj = new Object();
if ($xml.find('response').size() > 0) {
var _response = _recursiveXml2Object($xml.find('response'));
obj.type = 'response';
obj.response = _response;
}
else if ($xml.find('error').size() > 0) {
var _code = $xml.find('code').text();
var _message = $xml.find('message').text();
log.warn('MAIN : error code = ' + _code);
log.warn('MAIN : error msg = ' + _message);
obj.type = 'error';
obj.error = {
code: _code,
message: _message
};
}
else if ($xml.find('config').size() > 0) {
var _config = _recursiveXml2Object($xml.find('config'));
obj.type = 'config';
obj.config = _config;
}
else {
obj.type = 'unknown';
}
return obj;
}
function getAjaxData(urlstr, callback_func, options) {
var myurl = AJAX_HEADER + urlstr + AJAX_TAIL;
var isAsync = true;
var nTimeout = AJAX_TIMEOUT;
var errorCallback = null;
if (options) {
if (options.sync) {
isAsync = (options.sync == true) ? false : true;
}
if (options.timeout) {
nTimeout = parseInt(options.timeout, 10);
if (isNaN(nTimeout)) {
nTimeout = AJAX_TIMEOUT;
}
}
errorCallback = options.errorCB;
}
var headers = {};
headers['__RequestVerificationToken'] = g_requestVerificationToken;
$.ajax({
async: isAsync,
headers: headers,
//cache: false,
type: 'GET',
timeout: nTimeout,
url: myurl,
//dataType: ($.browser.msie) ? "text" : "xml",
error: function(XMLHttpRequest, textStatus) {
try {
if (jQuery.isFunction(errorCallback)) {
errorCallback(XMLHttpRequest, textStatus);
}
log.error('MAIN : getAjaxData(' + myurl + ') error.');
log.error('MAIN : XMLHttpRequest.readyState = ' + XMLHttpRequest.readyState);
log.error('MAIN : XMLHttpRequest.status = ' + XMLHttpRequest.status);
log.error('MAIN : textStatus ' + textStatus);
}
catch (exception) {
log.error(exception);
}
},
success: function(data) {
log.debug('MAIN : getAjaxData(' + myurl + ') sucess.');
log.trace(data);
var xml;
if (typeof data == 'string' || typeof data == 'number') {
if (-1 != this.url.indexOf('/api/sdcard/sdcard')) {
data = sdResolveCannotParseChar(data);
}
if (!window.ActiveXObject) {
var parser = new DOMParser();
xml = parser.parseFromString(data, 'text/xml');
}
else {
//IE
xml = new ActiveXObject('Microsoft.XMLDOM');
xml.async = false;
xml.loadXML(data);
}
}
else {
xml = data;
}
if (typeof callback_func == 'function') {
callback_func($(xml));
}
else {
log.error('callback_func is undefined or not a function');
}
}
});
}
function getConfigData(urlstr, callback_func, options) {
var myurl = '../' + urlstr + '';
//var myurl = urlstr + "";
var isAsync = true;
var nTimeout = AJAX_TIMEOUT;
var errorCallback = null;
if (options) {
if (options.sync) {
isAsync = (options.sync == true) ? false : true;
}
if (options.timeout) {
nTimeout = parseInt(options.timeout, 10);
if (isNaN(nTimeout)) {
nTimeout = AJAX_TIMEOUT;
}
}
errorCallback = options.errorCB;
}
$.ajax({
async: isAsync,
//cache: false,
type: 'GET',
timeout: nTimeout,
url: myurl,
//dataType: ($.browser.msie) ? "text" : "xml",
error: function(XMLHttpRequest, textStatus, errorThrown) {
try {
log.debug('MAIN : getConfigData(' + myurl + ') error.');
log.error('MAIN : XMLHttpRequest.readyState = ' + XMLHttpRequest.readyState);
log.error('MAIN : XMLHttpRequest.status = ' + XMLHttpRequest.status);
log.error('MAIN : textStatus ' + textStatus);
if (jQuery.isFunction(errorCallback)) {
errorCallback(XMLHttpRequest, textStatus);
}
}
catch (exception) {
log.error(exception);
}
},
success: function(data) {
log.debug('MAIN : getConfigData(' + myurl + ') success.');
log.trace(data);
var xml;
if (typeof data == 'string' || typeof data == 'number') {
if (!window.ActiveXObject) {
var parser = new DOMParser();
xml = parser.parseFromString(data, 'text/xml');
}
else {
//IE
xml = new ActiveXObject('Microsoft.XMLDOM');
xml.async = false;
xml.loadXML(data);
}
}
else {
xml = data;
}
if (typeof callback_func == 'function') {
callback_func($(xml));
}
else {
log.error('callback_func is undefined or not a function');
}
}
});
}
function getDomain(){
getConfigData("config/lan/config.xml", function($xml){
var ret = xml2object($xml);
if(ret.type == "config")
{
DEFAULT_GATEWAY_DOMAIN.push(ret.config.landns.hgwurl.toLowerCase());
if( typeof(ret.config.landns.mcdomain) != 'undefined' )
{
GATEWAY_DOMAIN.push(ret.config.landns.mcdomain.toLowerCase());
}
}
}, {
sync: true
});
}
function getQueryStringByName(item) {
var svalue = location.search.match(new RegExp('[\?\&]' + item + '=([^\&]*)(\&?)', 'i'));
return svalue ? svalue[1] : svalue;
}
function isHandheldBrowser() {
var bRet = false;
if(0 == login_status){
return bRet;
}
if (isIphone || isIpod) {
log.debug("INDEX : current browser is iphone or ipod.");
bRet = true;
}
else if (isPsp) {
log.debug("INDEX : current browser is psp.");
bRet = true;
}
else if (isIpad) {
log.debug("INDEX : current browser is ipad.");
bRet = true;
}
else if (isAndroid) {
log.debug("INDEX : current browser is android.");
bRet = true;
}
else {
log.debug("INDEX : screen.height = " + screen.height);
log.debug("INDEX : screen.width = " + screen.width);
if (screen.height <= 320 || screen.width <= 320) {
bRet = true;
log.debug("INDEX : current browser screen size is small.");
}
}
log.debug("INDEX : isHandheldBrowser = " + bRet);
return bRet;
}
function update_openNewWindow () {
if (window.location.href.indexOf('?updataredirect=') > -1) {
var tmpUrl = window.location.href.substring(window.location.href.indexOf("?updataredirect="));
var newUrl = "http://" + tmpUrl.substring(tmpUrl.indexOf("?updataredirect=") + 16) + '/';
document.getElementById("update_newPage").setAttribute("href", newUrl);
document.getElementById("update_newPage").setAttribute("target", "_blank");
if($.browser.msie) {
$("#update_newPage").get(0).click();
} else {
var evt = document.createEvent("MouseEvents");
evt.initEvent("click", true, true);
document.getElementById('update_newPage').dispatchEvent(evt);
}
}
}
var g_requestVerificationToken = '';
function getAjaxToken() {
getAjaxData('api/webserver/token', function($xml) {
var ret = xml2object($xml);
if ('response' == ret.type) {
g_requestVerificationToken = ret.response.token;
}
}, {
sync: true
});
}
getAjaxToken();
var WangatewayAddr="";
var gatewayAddr = "";
var conntection_status = null;
var service_status = null;
var login_status = null;
// get current settings gateway address
getAjaxData("api/dhcp/settings", function($xml) {
var ret = xml2object($xml);
if ("response" == ret.type) {
gatewayAddr = ret.response.DhcpIPAddress;
}
}, {
sync : true
}
);
// get connection status
getAjaxData("api/monitoring/status", function($xml) {
var ret = xml2object($xml);
if ("response" == ret.type) {
conntection_status = parseInt(ret.response.ConnectionStatus,10);
service_status = parseInt(ret.response.ServiceStatus,10);
WangatewayAddr = ret.response.WanIPAddress;
}
}, {
sync : true
}
);
// get connection status
getAjaxData('config/global/config.xml', function($xml) {
var config_ret = xml2object($xml);
login_status = config_ret.config.login;
}, {
sync : true
}
);
if ("" == gatewayAddr) {
gatewayAddr = DEFAULT_GATEWAY_IP;
}
var href = "http://" + DEFAULT_GATEWAY_IP;
try {
href = window.location.href;
}
catch(exception) {
href = "http://" + DEFAULT_GATEWAY_IP;
}
// get incoming url from querystring
var incoming_url = href.substring(href.indexOf("?url=") + 5);
// truncate http://
if (incoming_url.indexOf("//") > -1) {
incoming_url = incoming_url.substring(incoming_url.indexOf("//") + 2);
}
//get *.html
var incoming_html = "";
if (incoming_url.indexOf(".html") > -1) {
incoming_html = incoming_url.substring(incoming_url.lastIndexOf("/") + 1, incoming_url.length);
}
// truncate tail
if (incoming_url.indexOf("/") != -1) {
incoming_url = incoming_url.substring(0, incoming_url.indexOf("/"));
}
incoming_url = incoming_url.toLowerCase();
var bIsSmallPage = isHandheldBrowser();
// var prefix = "http://" + gatewayAddr;
var g_indexIncomingUrlIsGateway = false;
// if incoming url == 192.168.1.1 or MobileWifi.home then goto login
// page
window.name = getQueryStringByName("version");
//check login status
var LOGIN_STATES_SUCCEED = "0";
var userLoginState = LOGIN_STATES_SUCCEED;
getAjaxData('api/user/state-login', function($xml) {
var ret = xml2object($xml);
if (ret.type == 'response') {
userLoginState=ret.response.State;
}
}, {
sync: true
});
$(document).ready(function() {
update_openNewWindow();
if(true == bIsSmallPage) {
if (userLoginState != LOGIN_STATES_SUCCEED) {
getAjaxData('config/global/config.xml', function($xml) {
var config_ret = xml2object($xml);
if(config_ret.type == 'config') {
if(config_ret.config.commend_enable == '1') {
gotoPageWithoutHistory("../html/commend.html");
g_indexIncomingUrlIsGateway = true;
}else {
g_indexIncomingUrlIsGateway = redirectOnCondition("",'index');
}
}
},{
sync: true
});
} else {
g_indexIncomingUrlIsGateway = redirectOnCondition("",'index');
}
} else {
g_indexIncomingUrlIsGateway = redirectOnCondition("",'index');
}
$( function() {
getDomain();
if (g_indexIncomingUrlIsGateway) {
return;
}
else if (conntection_status == 901 && service_status == 2) {
if ((incoming_url.indexOf(gatewayAddr)==0)
|| (incoming_url.indexOf(DEFAULT_GATEWAY_DOMAIN)==0)
|| (incoming_url.indexOf(WangatewayAddr)==0)
|| (incoming_url.indexOf(GATEWAY_DOMAIN)==0)){
gotoPageWithoutHistory("home.html");
}
else {
gotoPageWithoutHistory("update.html");
}
}
else {
gotoPageWithoutHistory("home.html");
}
});
});
</script>
</head>
<body style="background-color: #FFFFFF;">
<div>
<a id="update_newPage" href="#" target="_blank"></a>
</div>
<noscript>
Sorry, your browser does not support javascript.
</noscript>
</body>
</html>
答案 0 :(得分：0)
这看起来像路由器的DNS拦截/尝试重定向。看起来像是返回200的内容不是所请求的内容的情况。现在的问题是“如何发现这种情况？”
一种方法是使用http://clients1.google.com/generate_204来判断您是否在强制门户网站后面：因为在这种情况下路由器不太可能使用204。然而，对于这个用例来说，这似乎是一种有缺陷的方法。
也许这个问题就是一个很好的例子，说明为什么不应该推出自己的缓存？
无论如何这是必要的吗？我开始认为Unity中的HTTP缓存可能没有这个......