无法发出成功的 POST 请求

Question

我正在尝试发出 post 请求，但超时我收到错误（以 HTML 编码）。这是我的代码：

    if([mode isEqualToString:@"online"])
        {
            NSString *URL = [NSString stringWithFormat:@"http://130.1.5.183:9999/visit-reporting/content/visitreportservice/getCoverInfo"];

            NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:URL]];
            request.HTTPMethod = @"POST";
            [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];

            NSDictionary *jsonDictionary = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObjects: @"gds68342jhgdfk279364jkdbgfjksd82347", @"53afs", @"abc@def.com", @"2009-06-15T13:45:30", @"iPad", nil] forKeys:[NSArray arrayWithObjects:@"responseToken",@"userId", @"email", @"timeStamp", @"userAgent", nil]];
            NSString *requestBodyData = [jsonDictionary description];

            NSData *bodyData = [requestBodyData dataUsingEncoding:NSUTF8StringEncoding];
            request.HTTPBody = bodyData;

            @try {
                NSOperationQueue *q = [NSOperationQueue mainQueue];
                [NSURLConnection sendAsynchronousRequest:request queue:q completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

                    NSLog(@"%@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
                    NSMutableDictionary *parsedData = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&connectionError];

                    if(!parsedData)
                    {
                        NSLog(@"Not able to parse data");
                    }
                    else
                    {
// DO something
                       }
                }];
            }
            @catch (NSException *exception) {
                NSLog(@"%@", [exception description]);
            }
            @finally {
            }
        }
        else
        {
            //get cover information from offline database
        }

但是，当使用 REST 客户端（名为 COCOA REST CLIENT）检查响应时，会显示所需的响应。我不明白问题出在哪里。请帮忙。

这是我从我的代码发送 POST 请求时得到的响应：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>
    <title>Error</title>
</head>

<body>
    <p>An error has occured</p>

    <p>Click <a href="javascript:history.go(-1)">here</a> to navigate back to the page you were on previously.</p>


        <p>If this problem persists, please contact <a href="mailto:Support.vwg@vwg.co.uk?Subject=Visit Reporting Error&Body=Hi,%0D%0A%0D%0AI have been experiencing problems with the Visit Reporting application.%0D%0A%0D%0ACould you please look into this issue?">Support.vwg@vwg.co.uk</a></p>


</body>

</html>

Answer 1

我看到的第一件事是您正在使用 POST 请求和发布数据，但没有设置 @"Content-Length"

所以添加：

[request setValue:[NSString stringWithFormat:@"%lu", (unsigned long)[bodyData length]] forHTTPHeaderField:@"Content-Length"];

在运行连接之前

Answer 2

这不符合您的预期：

NSString *requestBodyData = [jsonDictionary description];

你需要使用NSJSONSerialization的class方法

dataWithJSONObject:options:error:

为了从您的 NSDictionary 对象中获取包含 UTF-8 字符序列的 NSData 对象。

另请参阅：NSJSONSerialization Class Reference

无法发出成功的 POST 请求

Not able to make a successful POST request

iphone

objective-c

http-post

ios