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Pierre-Olivier Latour
2014-10-16 08:17:36 -07:00
parent 8c8e4847a5
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@@ -153,9 +153,9 @@ println("Visit \(webServer.serverURL) in your web browser")
Asynchronous HTTP Responses
===========================
New in GCDWebServer 3.0 is the ability to process HTTP requests aysnchronously i.e. add handlers to the server that generate their ```GCDWebServerResponse``` asynchronously. This is achieved by adding handlers that use a ```GCDWebServerAsyncProcessBlock``` instead of a ```GCDWebServerProcessBlock```. Here's an example:
New in GCDWebServer 3.0 is the ability to process HTTP requests aysnchronously i.e. add handlers to the server which generate their ```GCDWebServerResponse``` asynchronously. This is achieved by adding handlers that use a ```GCDWebServerAsyncProcessBlock``` instead of a ```GCDWebServerProcessBlock```. Here's an example:
***Synchronous version***
**(Synchronous version)** The handler blocks while generating the HTTP response:
```objectivec
[webServer addDefaultHandlerForMethod:@"GET"
requestClass:[GCDWebServerRequest class]
@@ -167,7 +167,7 @@ New in GCDWebServer 3.0 is the ability to process HTTP requests aysnchronously i
}];
```
***Asynchronous version***
**(Asynchronous version)** The handler returns immediately and calls back GCDWebServer later with the generated HTTP response:
```objectivec
[webServer addDefaultHandlerForMethod:@"GET"
requestClass:[GCDWebServerRequest class]
@@ -182,6 +182,33 @@ New in GCDWebServer 3.0 is the ability to process HTTP requests aysnchronously i
}];
```
**(Advanced asynchronous version)** The handler returns immediately a streamed HTTP response which itself generates its contents asynchronously:
```objectivec
[webServer addDefaultHandlerForMethod:@"GET"
requestClass:[GCDWebServerRequest class]
asyncProcessBlock:^(GCDWebServerRequest* request, GCDWebServerCompletionBlock completionBlock) {
GCDWebServerStreamedResponse* response = [GCDWebServerStreamedResponse responseWithContentType:@"text/html" asyncStreamBlock:^(GCDWebServerBodyReaderCompletionBlock completionBlock) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
completionBlock([@"<html><body><p>Hello" dataUsingEncoding:NSUTF8StringEncoding], nil); // Generate the 1st part of the stream data
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
completionBlock([@"World</p></body></html>" dataUsingEncoding:NSUTF8StringEncoding], nil); // Generate the 2nd part of the stream data
completionBlock([NSData data], nil); // Must pass an empty NSData to signal the end of the stream
});
});
}];
return response;
}];
```
*Note that you can even combine both the asynchronous and advanced asynchronous versions to return asynchronously an asynchronous HTTP response!*
Web Based Uploads in iOS Apps
=============================