Added gzip for request bodies

Comments / code tweaks

@@ -44,12 +44,15 @@ extern NSString* const NetworkRequestErrorDomain;
 	// A queue delegate that should *ALSO* be notified of delegate message (used by ASINetworkQueue)
 	id queue;
 	
-	// HTTP method to use (GET / POST / PUT / DELETE). Defaults to GET
+	// HTTP method to use (GET / POST / PUT / DELETE / HEAD). Defaults to GET
 	NSString *requestMethod;
 	
 	// Request body - only used when the whole body is stored in memory (shouldStreamPostDataFromDisk is false)
 	NSMutableData *postBody;
 	
+	// gzipped request body used when shouldCompressRequestBody is YES
+	NSData *compressedPostBody;
+	
 	// When true, post body will be streamed from a file on disk, rather than loaded into memory at once (useful for large uploads)
 	// Automatically set to true in ASIFormDataRequests when using setFile:forKey:
 	BOOL shouldStreamPostDataFromDisk;
@@ -58,6 +61,9 @@ extern NSString* const NetworkRequestErrorDomain;
 	// You can set this yourself - useful if you want to PUT a file from local disk 
 	NSString *postBodyFilePath;
 	
+	// Path to a temporary file used to store a deflated post body (when shouldCompressPostBody is YES)
+	NSString *compressedPostBodyFilePath;
+	
 	// Set to true when ASIHTTPRequest automatically created a temporary file containing the request body (when true, the file at postBodyFilePath will be deleted at the end of the request)
 	BOOL didCreateTemporaryPostDataFile;
 	
@@ -91,6 +97,10 @@ extern NSString* const NetworkRequestErrorDomain;
 	// If allowCompressedResponse is true, requests will inform the server they can accept compressed data, and will automatically decompress gzipped responses. Default is true.
 	BOOL allowCompressedResponse;
 	
+	// If shouldCompressRequestBody is true, the request body will be gzipped. Default is false.
+	// You will probably need to enable this feature on your webserver to make this work. Tested with apache only.
+	BOOL shouldCompressRequestBody;
+	
 	// When downloadDestinationPath is set, the result of this request will be downloaded to the file at this location
 	// If downloadDestinationPath is not set, download data will be stored in memory
 	NSString *downloadDestinationPath;
@@ -203,11 +213,18 @@ extern NSString* const NetworkRequestErrorDomain;
 	// Prevents the body of the post being built more than once (largely for subclasses)
 	BOOL haveBuiltPostBody;
 	
+	// Used internally, may reflect the size of the internal used by CFNetwork
+	// POST / PUT operations with body sizes greater than uploadBufferSize will not timeout unless more than uploadBufferSize bytes have been sent
+	// Likely to be 32KB on iPhone 3.0, 128KB on Mac OS X Leopard and iPhone 2.2.x
 	unsigned long long uploadBufferSize;
 	
+	// Text encoding for responses that do not send a Content-Type with a charset value. Defaults to NSISOLatin1StringEncoding
 	NSStringEncoding defaultResponseEncoding;
+	
+	// The text encoding of the response, will be defaultResponseEncoding if the server didn't specify. Can't be set.
 	NSStringEncoding responseEncoding;
 	
+	// Tells ASIHTTPRequest not to delete partial downloads, and allows it to use an existing file to resume a download. Defaults to NO.
 	BOOL allowResumeForFileDownloads;
 	
 	// Custom user information assosiated with the request
@@ -360,7 +377,7 @@ extern NSString* const NetworkRequestErrorDomain;
 // Dump all session data (authentication and cookies)
 + (void)clearSession;
 
-#pragma mark gzip compression
+#pragma mark gzip decompression
 
 // Uncompress gzipped data with zlib
 + (NSData *)uncompressZippedData:(NSData*)compressedData;
@@ -369,6 +386,15 @@ extern NSString* const NetworkRequestErrorDomain;
 + (int)uncompressZippedDataFromFile:(NSString *)sourcePath toFile:(NSString *)destinationPath;
 + (int)uncompressZippedDataFromSource:(FILE *)source toDestination:(FILE *)dest;
 
+#pragma mark gzip compression
+
+// Compress data with gzip using zlib
++ (NSData *)compressData:(NSData*)uncompressedData;
+
+// gzip compress data from a file, saving to another file, used for uploading when shouldCompressRequestBody is true
++ (int)compressDataFromFile:(NSString *)sourcePath toFile:(NSString *)destinationPath;
++ (int)compressDataFromSource:(FILE *)source toDestination:(FILE *)dest;
+
 @property (retain) NSString *username;
 @property (retain) NSString *password;
 @property (retain) NSString *domain;
@@ -417,4 +443,5 @@ extern NSString* const NetworkRequestErrorDomain;
 @property (assign, readonly) unsigned long long partialDownloadSize;
 @property (assign) BOOL shouldRedirect;
 @property (assign) BOOL validatesSecureCertificate;
+@property (assign) BOOL shouldCompressRequestBody;
 @end

@@ -37,5 +37,6 @@
 - (void)testTooMuchRedirection;
 - (void)testRedirectToNewDomain;
 - (void)test303Redirect;
+- (void)testCompression;
 
 @end

@@ -10,7 +10,7 @@
 #import "ASIHTTPRequest.h"
 #import "ASINSStringAdditions.h"
 #import "ASINetworkQueue.h"
-
+#import "ASIFormDataRequest.h"
 
 @implementation ASIHTTPRequestTests
 
@@ -680,6 +680,58 @@
 	GHAssertTrue(success,@"Failed to use GET on new URL");
 }
 
+- (void)testCompression
+{
+	NSString *content = @"This is the test content. This is the test content. This is the test content. This is the test content.";
+	
+	// Test in memory compression / decompression
+	NSData *data = [content dataUsingEncoding:NSUTF8StringEncoding];
+	NSData *compressedData = [ASIHTTPRequest compressData:data];
+	NSData *uncompressedData = [ASIHTTPRequest uncompressZippedData:compressedData];
+	NSString *newContent = [[[NSString alloc] initWithBytes:[uncompressedData bytes] length:[uncompressedData length] encoding:NSUTF8StringEncoding] autorelease];
+	
+	BOOL success = [newContent isEqualToString:content];
+	GHAssertTrue(success,@"Failed compress or decompress the correct data");	
+	
+	// Test file to file compression / decompression
+	NSString *basePath = [[[NSBundle mainBundle] bundlePath] stringByDeletingLastPathComponent];
+	NSString *sourcePath = [basePath stringByAppendingPathComponent:@"text.txt"];
+	NSString *destPath = [basePath stringByAppendingPathComponent:@"text.txt.compressed"];
+	NSString *newPath = [basePath stringByAppendingPathComponent:@"text2.txt"];
+	
+	[content writeToFile:sourcePath atomically:NO encoding:NSUTF8StringEncoding error:NULL];
+	[ASIHTTPRequest compressDataFromFile:sourcePath toFile:destPath];
+	[ASIHTTPRequest uncompressZippedDataFromFile:destPath toFile:newPath];
+	success = [[NSString stringWithContentsOfFile:newPath encoding:NSUTF8StringEncoding error:NULL] isEqualToString:content];
+	GHAssertTrue(success,@"Failed compress or decompress the correct data");
+	
+	// Test compressed body
+	// Body is deflated by ASIHTTPRequest, sent, inflated by the server, printed, deflated by mod_deflate, response is inflated by ASIHTTPRequest
+	ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:@"http://asi/ASIHTTPRequest/tests/compressed_post_body"]];
+	[request setRequestMethod:@"PUT"];
+	[request setShouldCompressRequestBody:YES];
+	[request appendPostData:data];
+	[request start];
+	
+	success = [[request responseString] isEqualToString:content];
+	GHAssertTrue(success,@"Failed to compress the body, or server failed to decompress it");	
+	
+	
+	request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:@"http://allseeing-i.com/ASIHTTPRequest/tests/compressed_post_body"]];
+	[request setRequestMethod:@"PUT"];
+	[request setShouldCompressRequestBody:YES];
+	[request setShouldStreamPostDataFromDisk:YES];
+	[request setUploadProgressDelegate:self];
+	[request setPostBodyFilePath:sourcePath];
+
+	[request start];
+	
+	success = [[request responseString] isEqualToString:content];
+	GHAssertTrue(success,@"Failed to compress the body, or server failed to decompress it");		
+	
+
+
+}
 
 
 @end