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AFHTTPClient.m
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AFHTTPClient.m
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// AFHTTPClient.m
//
// Copyright (c) 2011 Gowalla (http://gowalla.com/)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#import "AFHTTPClient.h"
#import "AFJSONRequestOperation.h"
static NSString * const kAFMultipartFormLineDelimiter = @"\r\n"; // CRLF
static NSString * const kAFMultipartFormBoundary = @"Boundary+0xAbCdEfGbOuNdArY";
static NSString * AFMultipartFormEncapsulationBoundary() {
return [NSString stringWithFormat:@"--%@", kAFMultipartFormBoundary];
}
static NSString * AFMultipartFormFinalBoundary() {
return [NSString stringWithFormat:@"--%@--", kAFMultipartFormBoundary];
}
@interface AFMultipartFormDataProxy : NSObject <AFMultipartFormDataProxy> {
@private
NSStringEncoding _stringEncoding;
NSMutableData *_mutableData;
}
@property (readonly) NSData *data;
- (id)initWithStringEncoding:(NSStringEncoding)encoding;
@end
#pragma mark -
static NSString * AFBase64EncodedStringFromString(NSString *string) {
NSData *data = [NSData dataWithBytes:[string UTF8String] length:[string length]];
NSUInteger length = [data length];
NSMutableData *mutableData = [NSMutableData dataWithLength:((length + 2) / 3) * 4];
uint8_t *input = (uint8_t *)[data bytes];
uint8_t *output = (uint8_t *)[mutableData mutableBytes];
for (NSUInteger i = 0; i < length; i += 3) {
NSUInteger value = 0;
for (NSUInteger j = i; j < (i + 3); j++) {
value <<= 8;
if (j < length) {
value |= (0xFF & input[j]);
}
}
static char const kAFBase64EncodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
NSInteger idx = (i / 3) * 4;
output[idx + 0] = kAFBase64EncodingTable[(value >> 18) & 0x3F];
output[idx + 1] = kAFBase64EncodingTable[(value >> 12) & 0x3F];
output[idx + 2] = (i + 1) < length ? kAFBase64EncodingTable[(value >> 6) & 0x3F] : '=';
output[idx + 3] = (i + 2) < length ? kAFBase64EncodingTable[(value >> 0) & 0x3F] : '=';
}
return [[[NSString alloc] initWithData:mutableData encoding:NSASCIIStringEncoding] autorelease];
}
static NSString * AFURLEncodedStringFromStringWithEncoding(NSString *string, NSStringEncoding encoding) {
static NSString * const kAFLegalCharactersToBeEscaped = @"?!@#$^&%*+,:;='\"`<>()[]{}/\\|~ ";
return [(NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)string, NULL, (CFStringRef)kAFLegalCharactersToBeEscaped, CFStringConvertNSStringEncodingToEncoding(encoding)) autorelease];
}
@interface AFHTTPClient ()
@property (readwrite, nonatomic, retain) NSURL *baseURL;
@property (readwrite, nonatomic, retain) NSMutableDictionary *defaultHeaders;
@property (readwrite, nonatomic, retain) NSOperationQueue *operationQueue;
@end
@implementation AFHTTPClient
@synthesize baseURL = _baseURL;
@synthesize stringEncoding = _stringEncoding;
@synthesize defaultHeaders = _defaultHeaders;
@synthesize operationQueue = _operationQueue;
+ (AFHTTPClient *)clientWithBaseURL:(NSURL *)url {
return [[[self alloc] initWithBaseURL:url] autorelease];
}
- (id)initWithBaseURL:(NSURL *)url {
self = [super init];
if (!self) {
return nil;
}
self.baseURL = url;
self.stringEncoding = NSUTF8StringEncoding;
self.defaultHeaders = [NSMutableDictionary dictionary];
// Accept HTTP Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1
[self setDefaultHeader:@"Accept" value:@"application/json"];
// Accept-Encoding HTTP Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.3
[self setDefaultHeader:@"Accept-Encoding" value:@"gzip"];
// Accept-Language HTTP Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.4
NSString *preferredLanguageCodes = [[NSLocale preferredLanguages] componentsJoinedByString:@", "];
[self setDefaultHeader:@"Accept-Language" value:[NSString stringWithFormat:@"%@, en-us;q=0.8", preferredLanguageCodes]];
// User-Agent Header; see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.43
[self setDefaultHeader:@"User-Agent" value:[NSString stringWithFormat:@"%@/%@ (%@, %@ %@, %@, Scale/%f)", [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString *)kCFBundleIdentifierKey], [[[NSBundle mainBundle] infoDictionary] objectForKey:(NSString *)kCFBundleVersionKey], @"unknown", [[UIDevice currentDevice] systemName], [[UIDevice currentDevice] systemVersion], [[UIDevice currentDevice] model], ([[UIScreen mainScreen] respondsToSelector:@selector(scale)] ? [[UIScreen mainScreen] scale] : 1.0)]];
self.operationQueue = [[[NSOperationQueue alloc] init] autorelease];
[self.operationQueue setMaxConcurrentOperationCount:2];
return self;
}
- (void)dealloc {
[_baseURL release];
[_defaultHeaders release];
[_operationQueue release];
[super dealloc];
}
- (NSString *)defaultValueForHeader:(NSString *)header {
return [self.defaultHeaders valueForKey:header];
}
- (void)setDefaultHeader:(NSString *)header value:(NSString *)value {
[self.defaultHeaders setObject:value forKey:header];
}
- (void)setAuthorizationHeaderWithUsername:(NSString *)username password:(NSString *)password {
NSString *basicAuthCredentials = [NSString stringWithFormat:@"%@:%@", username, password];
[self setDefaultHeader:@"Authorization" value:[NSString stringWithFormat:@"Basic %@", AFBase64EncodedStringFromString(basicAuthCredentials)]];
}
- (void)setAuthorizationHeaderWithToken:(NSString *)token {
[self setDefaultHeader:@"Authorization" value:[NSString stringWithFormat:@"Token token=\"%@\"", token]];
}
- (void)clearAuthorizationHeader {
[self.defaultHeaders removeObjectForKey:@"Authorization"];
}
#pragma mark -
- (NSMutableURLRequest *)requestWithMethod:(NSString *)method path:(NSString *)path parameters:(NSDictionary *)parameters {
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
NSMutableDictionary *headers = [NSMutableDictionary dictionaryWithDictionary:self.defaultHeaders];
NSURL *url = [NSURL URLWithString:path relativeToURL:self.baseURL];
if (parameters) {
NSMutableArray *mutableParameterComponents = [NSMutableArray array];
for (id key in [parameters allKeys]) {
NSString *component = [NSString stringWithFormat:@"%@=%@", AFURLEncodedStringFromStringWithEncoding([key description], self.stringEncoding), AFURLEncodedStringFromStringWithEncoding([[parameters valueForKey:key] description], self.stringEncoding)];
[mutableParameterComponents addObject:component];
}
NSString *queryString = [mutableParameterComponents componentsJoinedByString:@"&"];
if ([method isEqualToString:@"GET"]) {
url = [NSURL URLWithString:[[url absoluteString] stringByAppendingFormat:[path rangeOfString:@"?"].location == NSNotFound ? @"?%@" : @"&%@", queryString]];
} else {
NSString *charset = (NSString *)CFStringConvertEncodingToIANACharSetName(CFStringConvertNSStringEncodingToEncoding(self.stringEncoding));
[headers setObject:[NSString stringWithFormat:@"application/x-www-form-urlencoded; charset=%@", charset] forKey:@"Content-Type"];
[request setHTTPBody:[queryString dataUsingEncoding:self.stringEncoding]];
}
}
[request setURL:url];
[request setHTTPMethod:method];
[request setHTTPShouldHandleCookies:NO];
[request setAllHTTPHeaderFields:headers];
return request;
}
- (NSMutableURLRequest *)multipartFormRequestWithMethod:(NSString *)method
path:(NSString *)path
parameters:(NSDictionary *)parameters
constructingBodyWithBlock:(void (^)(id <AFMultipartFormDataProxy>formData))block
{
if (!([method isEqualToString:@"POST"] || [method isEqualToString:@"PUT"] || [method isEqualToString:@"DELETE"])) {
[NSException raise:@"Invalid HTTP Method" format:@"%@ is not supported for multipart form requests; must be either POST, PUT, or DELETE", method];
return nil;
}
NSMutableURLRequest *request = [self requestWithMethod:method path:path parameters:nil];
__block AFMultipartFormDataProxy *formData = [[AFMultipartFormDataProxy alloc] initWithStringEncoding:self.stringEncoding];
id key = nil;
NSEnumerator *enumerator = [parameters keyEnumerator];
while ((key = [enumerator nextObject])) {
id value = [parameters valueForKey:key];
NSData *data = nil;
if ([value isKindOfClass:[NSData class]]) {
data = value;
} else {
data = [[value description] dataUsingEncoding:self.stringEncoding];
}
[formData appendPartWithHeaders:[NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"form-data; name=\"%@\"", [key description]] forKey:@"Content-Disposition"] body:data];
}
if (block) {
block(formData);
}
[request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@", kAFMultipartFormBoundary] forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:[formData data]];
[formData autorelease];
return request;
}
- (void)enqueueHTTPOperationWithRequest:(NSURLRequest *)request success:(void (^)(id response))success failure:(void (^)(NSError *error))failure {
if ([request URL] == nil || [[request URL] isEqual:[NSNull null]]) {
return;
}
AFHTTPRequestOperation *operation = [AFJSONRequestOperation operationWithRequest:request success:success failure:failure];
[self.operationQueue addOperation:operation];
}
- (void)cancelHTTPOperationsWithMethod:(NSString *)method andURL:(NSURL *)url {
for (AFHTTPRequestOperation *operation in [self.operationQueue operations]) {
if ([[[operation request] HTTPMethod] isEqualToString:method] && [[[operation request] URL] isEqual:url]) {
[operation cancel];
}
}
}
#pragma mark -
- (void)getPath:(NSString *)path parameters:(NSDictionary *)parameters success:(void (^)(id response))success failure:(void (^)(NSError *error))failure {
NSURLRequest *request = [self requestWithMethod:@"GET" path:path parameters:parameters];
[self enqueueHTTPOperationWithRequest:request success:success failure:failure];
}
- (void)postPath:(NSString *)path parameters:(NSDictionary *)parameters success:(void (^)(id response))success failure:(void (^)(NSError *error))failure {
NSURLRequest *request = [self requestWithMethod:@"POST" path:path parameters:parameters];
[self enqueueHTTPOperationWithRequest:request success:success failure:failure];
}
- (void)putPath:(NSString *)path parameters:(NSDictionary *)parameters success:(void (^)(id response))success failure:(void (^)(NSError *error))failure {
NSURLRequest *request = [self requestWithMethod:@"PUT" path:path parameters:parameters];
[self enqueueHTTPOperationWithRequest:request success:success failure:failure];
}
- (void)deletePath:(NSString *)path parameters:(NSDictionary *)parameters success:(void (^)(id response))success failure:(void (^)(NSError *error))failure {
NSURLRequest *request = [self requestWithMethod:@"DELETE" path:path parameters:parameters];
[self enqueueHTTPOperationWithRequest:request success:success failure:failure];
}
@end
#pragma mark -
// multipart/form-data; see http://www.w3.org/TR/html4/interact/forms.html#h-17.13.4.2
@interface AFMultipartFormDataProxy ()
@property (readwrite, nonatomic, assign) NSStringEncoding stringEncoding;
@property (readwrite, nonatomic, retain) NSMutableData *mutableData;
- (void)appendBlankLine;
@end
@implementation AFMultipartFormDataProxy
@synthesize stringEncoding = _stringEncoding;
@synthesize mutableData = _mutableData;
- (id)initWithStringEncoding:(NSStringEncoding)encoding {
self = [super init];
if (!self) {
return nil;
}
self.stringEncoding = encoding;
self.mutableData = [NSMutableData dataWithLength:0];
return self;
}
- (void)dealloc {
[_mutableData release];
[super dealloc];
}
- (NSData *)data {
NSMutableData *finalizedData = [NSMutableData dataWithData:self.mutableData];
[finalizedData appendData:[AFMultipartFormFinalBoundary() dataUsingEncoding:self.stringEncoding]];
return finalizedData;
}
#pragma mark - AFMultipartFormDataProxy
- (void)appendPartWithHeaders:(NSDictionary *)headers body:(NSData *)body {
if ([self.mutableData length] > 0) {
[self appendString:AFMultipartFormEncapsulationBoundary()];
[self appendBlankLine];
}
for (NSString *field in [headers allKeys]) {
[self appendString:[NSString stringWithFormat:@"%@: %@", field, [headers valueForKey:field]]];
[self appendBlankLine];
}
[self appendBlankLine];
[self appendData:body];
}
- (void)appendPartWithFormData:(NSData *)data mimeType:(NSString *)mimeType name:(NSString *)name {
NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
[mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\"", name] forKey:@"Content-Disposition"];
if (mimeType) {
[mutableHeaders setValue:mimeType forKey:@"Content-Type"];
}
[self appendPartWithHeaders:mutableHeaders body:data];
}
- (void)appendPartWithFile:(NSURL *)fileURL mimeType:(NSString *)mimeType fileName:(NSString *)fileName {
if (![fileURL isFileURL]) {
[NSException raise:@"Invalid fileURL value" format:@"%@ must be a valid file URL", fileURL];
return;
}
NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
[mutableHeaders setValue:[NSString stringWithFormat:@"file; filename=\"%@\"", fileName] forKey:@"Content-Disposition"];
[mutableHeaders setValue:mimeType forKey:@"Content-Type"];
NSData *data = [NSData dataWithContentsOfFile:[fileURL absoluteString]];
[self appendPartWithHeaders:mutableHeaders body:data];
}
- (void)appendData:(NSData *)data {
[self.mutableData appendData:data];
}
- (void)appendString:(NSString *)string {
[self appendData:[string dataUsingEncoding:self.stringEncoding]];
}
- (void)appendBlankLine {
[self appendString:kAFMultipartFormLineDelimiter];
}
@end