我不知道如何向 Overpass-API 的 post 请求添加参数。为了创建请求，我使用 AFNetworking。
1) 一开始，我在 overpass-turbo.eu 中构建查询，然后将其导出到 XML，所以我得到了这个
<code><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></code>
并将其放入 NSString
<pre><code>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>";
</code></pre>
2)比我尝试构建参数 AFNetworking - How can I PUT and POST raw data without using a key value pair?
所以我创建了 NSData 类别方法 base64DataFromString is available here .
并创建我的请求
<pre><code>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];
</code></pre>
3)但现在我收到错误
<code>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=<...</code>
我做错了什么？
最佳答案
您需要实现的是以 xml 作为正文创建请求。在您的示例中，AFNetworking 会将参数转换为某个正文，但该正文不会是 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 - How can I PUT and POST raw data without using a key value pair?
关于ios - Overpass-API iOS 示例，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27360841/