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我正在使用以下代码将图像上传到我的服务器：

// Dictionary that holds post parameters. You can set your post parameters that your server accepts or programmed to accept.
NSMutableDictionary* _params = [[NSMutableDictionary alloc] init];
DataManager *manager = [DataManager sharedManager];
[_params setObject:[manager token] forKey:@"token"];
[_params setObject:[NSString stringWithFormat:@"%d",[manager site_id]] forKey:@"site"];

NSString *BoundaryConstant = @"----------V2ymHFg03ehbqgZCaKO6jy";
NSString* FileParamConstant = @"image";
NSURL* requestURL = [NSURL URLWithString:@"https://mysite.com/api/upload/"];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
[request setHTTPShouldHandleCookies:NO];
[request setTimeoutInterval:30];
[request setHTTPMethod:@"POST"];

NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", BoundaryConstant];
[request setValue:contentType forHTTPHeaderField: @"Content-Type"];

NSMutableData *body = [NSMutableData data];

for (NSString *param in _params) {
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", BoundaryConstant] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"%@\r\n", [_params objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]];
}

NSData *imageData = UIImageJPEGRepresentation(saveImage, 1.0);
if (imageData) {
    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", BoundaryConstant] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", FileParamConstant] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Type: image/jpeg\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:imageData];
    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
}

[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", BoundaryConstant] dataUsingEncoding:NSUTF8StringEncoding]];

[request setHTTPBody:body];
NSLog(@"%@",body);

NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];
NSLog(@"Sending request with length: %@",postLength);
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];

[request setURL:requestURL];
 NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];

在我尝试上传时查看我的服务器日志，我没有得到很多信息：

82.132.x.x - - [06/Feb/2013:15:37:45 +0000] "-" 400 0 "-" "-"

将此与来自同一应用程序的另一个查询进行比较：

82.132.x.x - - [06/Feb/2013:15:36:13 +0000] "GET /api/sites/?token=blah HTTP/1.1" 200 269 "-" "My%20App/1.0 CFNetwork/609.1.4 Darwin/13.0.0"

我怎样才能弄清楚出了什么问题？显然，请求在某种程度上是错误的，导致错误 400。有什么工具可以用来检查它吗？

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2 回答 2

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试试查尔斯......它比使用wireshark更友好（不是免费的......但他们有试用版）http://www.charlesproxy.com/

于 2013-02-06T15:50:41.897 回答
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Wireshark 应该允许您检查正在发送/接收的内容。http://www.wireshark.org/download.html

于 2013-02-06T15:47:10.170 回答