如何发送POST和GET请求？ [英] How to send POST and GET request?
本文介绍了如何发送POST和GET请求？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想将我的 JSON 发送到一个URL（ POST 和 GET < code $）。
NSMutableDictionary * JSONDict = [[NSMutableDictionary alloc] init];
[JSONDict setValue：myValueforKey：myKey];
NSData * JSONData = [NSJSONSerialization dataWithJSONObject：self options：kNilOptions error：nil];
我当前的请求代码不起作用。 / p>
NSMutableURLRequest * requestData = [[NSMutableURLRequest alloc] init];
[requestData setURL：[NSURL URLWithString：@http：//fake.url/];];
[requestData setHTTPMethod：@POST];
[requestData setValue：postLength forHTTPHeaderField：@Content-Length];
[requestData setValue：@application / jsonforHTTPHeaderField：@Content-Type];
[requestData setValue：@application / jsonforHTTPHeaderField：@Accept];
[requestData setHTTPBody：postData];
使用 ASIHTTPRequest 是不是是一个可靠的答案。 发送在iOS中POST 和 GET 请求非常简单;并且不需要额外的框架。
POST 请求：
我们首先创建我们的 POST 的 body （我们想要发送的）作为 NSString ，并将其转换为 NSData 显示问题标记为'objective-c''rel =标记标记为b
NSString * post = [NSString stringWithFormat：@test = Message& this = isNotReal ];
NSData * postData = [post dataUsingEncoding：NSASCIIStringEncoding allowLossyConversion：YES];
接下来，我们读取 postData ' length ，所以我们可以在请求中传递它。
NSString * postLength = [NSString stringWithFormat：@％d，[postData length]];
现在我们有了我们想发布的内容，我们可以创建一个 NSMutableURLRequest ，并包含我们的 postData 。
NSMutableURLRequest * request = [[NSMutableURLRequest alloc] init];
[request setURL：[NSURL URLWithString：@http://YourURL.com/FakeURL]];
[request setHTTPMethod：@POST];
[request setValue：postLength forHTTPHeaderField：@Content-Length];
[request setHTTPBody：postData];
let post =test = Message& amp ; this = isNotReal
let postData = post.data（using：String.Encoding.ascii，allowLossyConversion：true）
let postLength = String（postData！.count）
var request = URLRequest（url：URL（字符串：http://YourURL.com/FakeURL/PARAMETERS）！）
request.httpMethod =POST
request.addValue（ postLength，forHTTPHeaderField：Content-Length）
request.httpBody = postData;
最后，我们可以发送我们的请求，并通过创建一个新的 NSURLSession ：
objective-c 的问题
NSURLSession * session = [NSURLSession sessionWithConfiguration：[NSURLSessionConfiguration defaultSessionConfiguration]];
[[session dataTaskWithRequest：request completionHandler：^（NSData * data，NSURLResponse * response，NSError * error）{
NSString * requestReply = [[NSString alloc] initWithData：data encoding：NSASCIIStringEncoding];
NSLog（@请求回复：％@，requestReply）;
}] resume];
$ b
let session = URLSession（configuration：
session.dataTask（with：request）{data，response，error in
let requestReply = NSString（data：data !, encoding：String.Encoding.ascii.rawValue）
print（Request reply：\（requestReply！））
} .resume（）
< hr>
GET 请求：
使用 GET 请求它基本上是一样的，只有没有 HTTPBody 和 Content-长度。
NSMutableURLRequest * request = [[ NSMutableURLRequest alloc] init];
[request setURL：[NSURL URLWithString：@http://YourURL.com/FakeURL/PARAMETERS]];
[request setHTTPMethod：@GET];
NSURLSession * session = [NSURLSession sessionWithConfiguration：[NSURLSessionConfiguration defaultSessionConfiguration]];
[[session dataTaskWithRequest：request completionHandler：^（NSData * data，NSURLResponse * response，NSError * error）{
NSString * requestReply = [[NSString alloc] initWithData：data encoding：NSASCIIStringEncoding];
NSLog（@请求回复：％@，requestReply）;
}] resume];
swift
$ b
var request = URLRequest（url： URL（string：http://YourURL.com/FakeURL/PARAMETERS）！）
request.httpMethod =GET
let session = URLSession（configuration：.default）
session.dataTask（with：request）{data，response，
let requestReply = NSString（data：data !, encoding：String.Encoding.ascii.rawValue）
print（Request回复：\（requestReply！））
.resume（）
在附注中，您可以添加 Content-Type （和其他数据）到 NSMutableURLRequest 。这可能是服务器在请求时需要的，例如 json 。
[request setValue：@application / jsonforHTTPHeaderField ：@内容类型];
[request setValue：@application / jsonforHTTPHeaderField：@Accept];
响应代码也可以使用 [（NSHTTPURLResponse *）response statusCode] 。
request.addValue（application / json，forHTTPHeaderField： Content-Type）
request.addValue（application / json，forHTTPHeaderField：Accept）
更新： sendSynchronousRequest 是弃用 from ios9 和 osx-elcapitan （10.11）和out。
NSURLResponse * requestResponse; NSData * requestHandler = [NSURLConnection sendSynchronousRequest：request returningResponse：& requestResponse error：nil]; NSString * requestReply = [[NSString alloc] initWithBytes：[requestHandler bytes] length：[requestHandler length] encoding：NSASCIIStringEncoding]; NSLog（@requestReply：％@，requestReply）;
I want to send my JSON to a URL (POST and GET).
NSMutableDictionary *JSONDict = [[NSMutableDictionary alloc] init];
[JSONDict setValue:"myValue" forKey:"myKey"];
NSData *JSONData = [NSJSONSerialization dataWithJSONObject:self options:kNilOptions error:nil];
My current request code isn't working.
NSMutableURLRequest *requestData = [[NSMutableURLRequest alloc] init];
[requestData setURL:[NSURL URLWithString:@"http://fake.url/"];];
[requestData setHTTPMethod:@"POST"];
[requestData setValue:postLength forHTTPHeaderField:@"Content-Length"];
[requestData setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[requestData setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[requestData setHTTPBody:postData];
Using ASIHTTPRequest is not a liable answer.
解决方案
Sending POST and GET requests in iOS is quite easy; and there's no need for an additional framework.
POST Request:
We begin by creating our POST's body (ergo. what we'd like to send) as an NSString, and converting it to NSData.
NSString *post = [NSString stringWithFormat:@"test=Message&this=isNotReal"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
Next up, we read the postData's length, so we can pass it along in the request.
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
Now that we have what we'd like to post, we can create an NSMutableURLRequest, and include our postData.
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:@"http://YourURL.com/FakeURL"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:postData];
let post = "test=Message&this=isNotReal"
let postData = post.data(using: String.Encoding.ascii, allowLossyConversion: true)
let postLength = String(postData!.count)
var request = URLRequest(url: URL(string: "http://YourURL.com/FakeURL/PARAMETERS")!)
request.httpMethod = "POST"
request.addValue(postLength, forHTTPHeaderField: "Content-Length")
request.httpBody = postData;
And finally, we can send our request, and read the reply by creating a new NSURLSession:
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
[[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
NSLog(@"Request reply: %@", requestReply);
}] resume];
let session = URLSession(configuration: .default)
session.dataTask(with: request) {data, response, error in
let requestReply = NSString(data: data!, encoding: String.Encoding.ascii.rawValue)
print("Request reply: \(requestReply!)")
}.resume()
GET Request:
With the GET request it's basically the same thing, only without the HTTPBody and Content-Length.
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:@"http://YourURL.com/FakeURL/PARAMETERS"]];
[request setHTTPMethod:@"GET"];
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
[[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
NSLog(@"Request reply: %@", requestReply);
}] resume];
var request = URLRequest(url: URL(string: "http://YourURL.com/FakeURL/PARAMETERS")!)
request.httpMethod = "GET"
let session = URLSession(configuration: .default)
session.dataTask(with: request) {data, response, error in
let requestReply = NSString(data: data!, encoding: String.Encoding.ascii.rawValue)
print("Request reply: \(requestReply!)")
}.resume()
On a side note, you can add Content-Type (and other data) by adding the following to our NSMutableURLRequest. This might be required by the server when requesting, e.g, a json.
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
Response code can also be read using [(NSHTTPURLResponse*)response statusCode].
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
Update: sendSynchronousRequest is deprecated from ios9 and osx-elcapitan (10.11) and out.
NSURLResponse *requestResponse; NSData *requestHandler = [NSURLConnection sendSynchronousRequest:request returningResponse:&requestResponse error:nil]; NSString *requestReply = [[NSString alloc] initWithBytes:[requestHandler bytes] length:[requestHandler length] encoding:NSASCIIStringEncoding]; NSLog(@"requestReply: %@", requestReply);
这篇关于如何发送POST和GET请求？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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