Overpass-API iOS示例

Question

我不知道如何将参数添加到Overpass-API的发布请求中。 要创建请求，我正在使用AFNetworking。

1）开始时，我在overpass-turbo.eu中构建查询，而不是将其导出到XML，所以我得到了这个

<osm-script> <query type="node"> <has-kv k="amenity" v="drinking_water"/> <bbox-query e="12.51119613647461" n="41.89248629819397" s="41.88659196260802" w="12.488558292388916"/> </query> <print/> </osm-script>

并将其放在NSString中

 NSString *myString = @"<osm-script><query type=\\"node\\"><has-kv k=\\"amenity\\" v=\\"drinking_water\\"/><bbox-query e=\\"12.51119613647461\\" n=\\"41.89248629819397\\" s=\\"41.88659196260802\\" w=\\"12.488558292388916\\"/></query><print/></osm-script>"; 

2）比我尝试构建参数 AFNetworking-如何在不使用键值对的情况下PUT和POST原始数据？

因此，我创建了NSData类别方法，此处 提供 base64DataFromString 。

并创建我的请求

 NSString *urlString = @"http://overpass-api.de/api/interpreter"; NSURL *myUrl = [NSURL URLWithString:urlString]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:myUrl]; // Generate an NSData from your NSString (see below for link to more info) NSData *postBody = [NSData base64DataFromString:myString]; // Add Content-Length header if your server needs it unsigned long long postLength = postBody.length; NSString *contentLength = [NSString stringWithFormat:@"%llu", postLength]; [request addValue:contentLength forHTTPHeaderField:@"Content-Length"]; // This should all look familiar... [request setHTTPMethod:@"POST"]; [request setHTTPBody:postBody]; AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; AFHTTPRequestOperation *operation = [manager HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation *operation, id responseObject) { NSLog(@"Response data: %@", responseObject); self.textView.text = responseObject; } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Error: %@", error); self.textView.text = [NSString stringWithFormat:@"%@",error]; }]; [manager.operationQueue addOperation:operation]; 

3）但现在我得到了错误

Error: Error Domain=com.alamofire.error.serialization.response Code=-1011 "Request failed: bad request (400)" UserInfo=0x1700fc680 {NSUnderlyingError=0x170247290 "Request failed: unacceptable content-type: text/html", com.alamofire.serialization.response.error.response=<NSHTTPURLResponse: 0x170230860> { URL: http://overpass-api.de/api/interpreter } { status code: 400, headers { Connection = close; "Content-Encoding" = gzip; "Content-Length" = 491; "Content-Type" = "text/html; charset=utf-8"; Date = "Sat, 13 Dec 2014 13:25:37 GMT"; Server = "Apache/2.2.22 (Ubuntu)"; Vary = "Accept-Encoding"; } }, NSErrorFailingURLKey=http://overpass-api.de/api/interpreter, com.alamofire.serialization.response.error.data=<...

我在做什么错？

Answer 1

您需要实现的是以XML为主体创建请求。 在您的示例中，AFNetworking会将参数转换为某些主体，但是该主体将不是xml。 您应该将xml存储为字符串并将其作为原始正文数据发送： AFNetworking-如何在不使用键值对的情况下PUT和POST原始数据？