适用于Objective-C的带有ClientLogin接口的Google App Engine

Question

我在之前的stackoverflow.com帖子中遇到了同样的问题.

具体来说,我似乎能够正确获取"Auth"令牌,但是当我访问后面的页面时,尝试在标题中使用它仍然只返回登录页面的HTML.

以下是与此帖相关的链接,我已确定您需要对此URL进行后续调用.

然后到URL调用会给你一个ACSID的cookie,然后需要在后续调用传递,以维持认证状态.

当请求此cookie,我读过各个岗位说你需要通过将其追加到查询字符串,从而指定你原来的身份验证令牌:

?auth=this_is_my_token

我也看到了在描述你应该设置在HTTP头谷歌的文档,这样一个HTTP标头名称/值是:

Authorization: GoogleLogin auth=yourAuthToken

我尝试了两种方法,但没有看到任何cookie返回.我使用Wireshark的,为的LiveHTTPHeaders Firefox和简单的NSLog语句尝试看看如果返回这样的事.

以下是我一直在使用的代码段.

NSURL* url = [NSURL URLWithString:[NSString stringWithFormat:@"http://yourapp.appspot.com/_ah/login?auth=%@", [token objectForKey:@"Auth"]]];
NSHTTPURLResponse* response;
NSError* error;
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setValue:[NSString stringWithFormat:@"GoogleLogin auth=%@", [token objectForKey:@"Auth"]] forHTTPHeaderField:@"Authorization"];
NSData * data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];  

//show me all header fields
NSLog([[response allHeaderFields] description]);

//show me the response
NSLog(@"%@", [[[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding] autorelease]);
NSArray * all = [NSHTTPCookie cookiesWithResponseHeaderFields:[response allHeaderFields] forURL:[NSURL URLWithString:@"http://yourapp.appspot.com/_ah/login"]];

//show me all cookies
for (NSHTTPCookie *cookie in all) 
{
    NSLog(@"Name: %@ : Value: %@", cookie.name, cookie.value); 
}

我希望您可以使用ClientLoginGoogle App Engine代码.

Answer 1

在此问题中添加示例代码,因为有人直接就我的解决方案与我联系.请注意,必须在初始令牌请求中将"service"参数设置为"ah".

令牌的初始请求[同步完成]注意:"service"参数设置为"ah","source"设置为"myapp",您应该使用您的应用程序名称.

//create request
NSString* content = [NSString stringWithFormat:@"accountType=HOSTED_OR_GOOGLE&Email=%@&Passwd=%@&service=ah&source=myapp", [loginView username].text, [loginView password].text];
NSURL* authUrl = [NSURL URLWithString:@"https://www.google.com/accounts/ClientLogin"];
NSMutableURLRequest* authRequest = [[NSMutableURLRequest alloc] initWithURL:authUrl];
[authRequest setHTTPMethod:@"POST"];
[authRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-type"];
[authRequest setHTTPBody:[content dataUsingEncoding:NSASCIIStringEncoding]];

NSHTTPURLResponse* authResponse;
NSError* authError;
NSData * authData = [NSURLConnection sendSynchronousRequest:authRequest returningResponse:&authResponse error:&authError];  

NSString *authResponseBody = [[NSString alloc] initWithData:authData encoding:NSASCIIStringEncoding];

//loop through response body which is key=value pairs, seperated by \n. The code below is not optimal and certainly error prone. 
NSArray *lines = [authResponseBody componentsSeparatedByString:@"\n"];
NSMutableDictionary* token = [NSMutableDictionary dictionary];
for (NSString* s in lines) {
    NSArray* kvpair = [s componentsSeparatedByString:@"="];
    if ([kvpair count]>1)
        [token setObject:[kvpair objectAtIndex:1] forKey:[kvpair objectAtIndex:0]];
}

//if google returned an error in the body [google returns Error=Bad Authentication in the body. which is weird, not sure if they use status codes]
if ([token objectForKey:@"Error"]) {
    //handle error
};

下一步是让您的应用在Google应用引擎上运行,为您提供ASCID Cookie.我不确定为什么会有这个额外的步骤,这似乎是谷歌的一个问题,也可能是为什么GAE目前不在他们列出的obj-c谷歌数据api库中.我的测试显示我必须请求cookie以便与GAE同步.另外,请注意我不对cookie做任何事情.它似乎只是通过请求和烹饪,未来的请求将自动包含cookie.我不确定这是否是iPhone的东西我的应用程序是一个iPhone应用程序,但我不完全了解这个cookie发生了什么.注意:使用"myapp.appspot.com".

NSURL* cookieUrl = [NSURL URLWithString:[NSString stringWithFormat:@"http://myapp.appspot.com/_ah/login?continue=http://myapp.appspot.com/&auth=%@", [token objectForKey:@"Auth"]]];
    NSLog([cookieUrl description]);
    NSHTTPURLResponse* cookieResponse;
    NSError* cookieError;
    NSMutableURLRequest *cookieRequest = [[NSMutableURLRequest alloc] initWithURL:cookieUrl];

    [cookieRequest setHTTPMethod:@"GET"];

    NSData* cookieData = [NSURLConnection sendSynchronousRequest:cookieRequest returningResponse:&cookieResponse error:&cookieError];   

最后,我可以将json发布到我的gae app.注意:下面的代码段是异步请求.我们可以通过实现didReceiveResponse,didReceiveData,didFailWIthError来处理响应.

NSURL* url = [NSURL URLWithString:[NSString stringWithFormat:@"http://myapp.appspot.com/addRun?auth=%@", mytoken]];
    NSMutableURLRequest* request = [[NSMutableURLRequest alloc] initWithURL:url];
    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:@"my http body";

    NSURLConnection *connectionResponse = [[NSURLConnection alloc] initWithRequest:request delegate:self];
    if (!connectionResponse) {
        NSLog(@"Failed to submit request");
    } else {
        NSLog(@"Request submitted");
    }