iOS H5页面中请求重定向(302)问题

使用WKWebView

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问题描述:iOS 通过WKWebView加载H5页面，H5页面中发送了post请求数据（此请求服务器会验证是否登录，判断cookie中是否存在sessionID），由于登录信息也就是sessionID没有传到H5页面（H5页面获取不到此sessionID，cookie为空），所以服务器判断该用户未登录，会重定向到登录界面，iOS会拦截该请求，所以导致请求出错。安卓这丫的没这问题。

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请求302

跨目录获取不到cookie

解决方法：iOS通过注入JS代码到H5页面，把sessionID赋值到H5页面的cookie中。记得cookie要设置path路径到根目录下—document.cookie=name+'='+value+';path=/;expires='+oDate;不然其他目录下的请求访问cookie。

document.cookie=name+'='+value+';path=/;expires='+oDate;

代码可写在下面方法中：

// 导航完成时

- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation {

或者一开始配置的时候就注册js代码

WKWebViewConfiguration *config = [[WKWebViewConfiguration alloc] init];

[config.userContentController addUserScript:[[WKUserScript alloc] initWithSource:[self setCookieToJS] injectionTime:(WKUserScriptInjectionTimeAtDocumentStart) forMainFrameOnly:YES]]

//为wkwebview 的H5代码注入js代码赋值cookie

-(NSString *)setCookieToJS{    

    //取出cookie    

    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];  

     for (NSHTTPCookie *cookie in cookieStorage.cookies) {        

            NSLog(@"name = %@ value = %@",cookie.name,cookie.value);    

    }    

    //js函数    

    NSString *JSFuncString =     @"function setCookie(name,value,expires)\    

    {\     var oDate=new Date();\    

    oDate.setDate(oDate.getDate()+expires);\    

    document.cookie=name+'='+value+';path=/;expires='+oDate;\    

    }\    

    function getCookie(name)\    

    {\    

    var arr = document.cookie.match(new RegExp('(^| )'+name+'=([^;]*)(;|$)'));\    

    if(arr != null) return unescape(arr[2]); return null;\    

    }\    

    function delCookie(name)\    

    {\    

    var exp = new Date();\    

    exp.setTime(exp.getTime() - 1);\    

    var cval=getCookie(name);\    

    if(cval!=null) document.cookie= name + '='+cval+';expires='+exp.toGMTString();\    

    }";

    //拼凑js字符串    

    NSMutableString *JSCookieString = JSFuncString.mutableCopy;    

    for (NSHTTPCookie *cookie in cookieStorage.cookies) {        

        //判断此cookie属于当前url        

        if([cookie.name isEqualToString:@"JSESSIONID"] && [_urlString containsString:cookie.domain] ){            

            NSString *excuteJSString = [NSString stringWithFormat:@"setCookie('%@', '%@', 1);", cookie.name, cookie.value];            

            [JSCookieString appendString:excuteJSString];        

        }    

    }    

    return JSCookieString;

}

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创建WKWebView的时候要配置cookie，传cookie

NSMutableDictionary *cookieDic = [NSMutableDictionary dictionary];    

NSMutableString *cookieValue = [NSMutableString stringWithFormat:@""];    

NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];       

  // cookie重复，先放到字典进行去重，再进行拼接    

for (NSString *key in cookieDic) {        

    NSString *appendString = [NSString stringWithFormat:@"%@=%@", key, [cookieDic valueForKey:key]];         [cookieValue appendString:appendString];    

}         

NSURL *url = [NSURL URLWithString:_urlString];    

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];    

[request addValue:cookieValue forHTTPHeaderField:@"Cookie"];    

[request addValue:@"app" forHTTPHeaderField:@"requestType"];         

[self.webView loadRequest:request];    

self.webView.navigationDelegate = self;    

self.webView.UIDelegate = self;