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Created July 21, 2014 03:47
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SVHTTPRequest 的修改
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gistfile1.txt
//
// SVHTTPRequest.m
//
// Created by Sam Vermette on 20.09.11.
// Copyright 2011 samvermette.com. All rights reserved.
// Modify by shiweifu 2014.7.11
//
// https://github.com/samvermette/SVHTTPRequest
//
#import "SVHTTPRequest.h"
@interface NSData (Base64)
- (NSString*)base64EncodingWithLineLength:(unsigned int)lineLength;
- (NSString *)getImageType;
- (BOOL)isJPG;
- (BOOL)isPNG;
- (BOOL)isGIF;
@end
@interface NSString (OAURLEncodingAdditions)
- (NSString*)encodedURLParameterString;
@end
enum {
SVHTTPRequestStateReady = 0,
SVHTTPRequestStateExecuting,
SVHTTPRequestStateFinished
};
typedef NSUInteger SVHTTPRequestState;
static NSUInteger taskCount = 0;
static NSString *defaultUserAgent;
static NSTimeInterval SVHTTPRequestTimeoutInterval = 20;
@interface SVHTTPRequest ()
@property (nonatomic, strong) NSMutableURLRequest *operationRequest;
@property (nonatomic, strong) NSMutableData *operationData;
@property (nonatomic, strong) NSFileHandle *operationFileHandle;
@property (nonatomic, strong) NSURLConnection *operationConnection;
@property (nonatomic, strong) NSDictionary *operationParameters;
@property (nonatomic, strong) NSHTTPURLResponse *operationURLResponse;
@property (nonatomic, strong) NSString *operationSavePath;
@property (nonatomic, assign) CFRunLoopRef operationRunLoop;
#if TARGET_OS_IPHONE
@property (nonatomic, readwrite) UIBackgroundTaskIdentifier backgroundTaskIdentifier;
#endif
#if !OS_OBJECT_USE_OBJC
@property (nonatomic, assign) dispatch_queue_t saveDataDispatchQueue;
@property (nonatomic, assign) dispatch_group_t saveDataDispatchGroup;
#else
@property (nonatomic, strong) dispatch_queue_t saveDataDispatchQueue;
@property (nonatomic, strong) dispatch_group_t saveDataDispatchGroup;
#endif
@property (nonatomic, copy) SVHTTPRequestCompletionHandler operationCompletionBlock;
@property (nonatomic, copy) void (^operationProgressBlock)(float progress);
@property (nonatomic, readwrite) SVHTTPRequestState state;
@property (nonatomic, strong) NSString *requestPath;
@property (nonatomic, strong) SVHTTPClient *client;
@property (nonatomic, strong) NSTimer *timeoutTimer; // see http://stackoverflow.com/questions/2736967
@property (nonatomic, readwrite) float expectedContentLength;
@property (nonatomic, readwrite) float receivedContentLength;
- (void)addParametersToRequest:(NSDictionary*)paramsDict;
- (void)finish;
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error;
- (void)callCompletionBlockWithResponse:(id)response error:(NSError *)error;
@end
@implementation SVHTTPRequest
@synthesize state = _state;
- (void)dealloc {
[_operationConnection cancel];
#if __IPHONE_OS_VERSION_MIN_REQUIRED < 60000
dispatch_release(_saveDataDispatchGroup);
dispatch_release(_saveDataDispatchQueue);
#endif
}
+ (void)setDefaultTimeoutInterval:(NSTimeInterval)interval {
SVHTTPRequestTimeoutInterval = interval;
}
+ (void)setDefaultUserAgent:(NSString *)userAgent {
defaultUserAgent = userAgent;
}
- (NSUInteger)timeoutInterval {
if(_timeoutInterval == 0)
return SVHTTPRequestTimeoutInterval;
return _timeoutInterval;
}
- (void)increaseTaskCount {
taskCount++;
[self toggleNetworkActivityIndicator];
}
- (void)decreaseTaskCount {
taskCount--;
[self toggleNetworkActivityIndicator];
}
- (void)toggleNetworkActivityIndicator {
#if TARGET_OS_IPHONE
dispatch_async(dispatch_get_main_queue(), ^{
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:(taskCount > 0)];
});
#endif
}
#pragma mark - Convenience Methods
+ (SVHTTPRequest*)GET:(NSString *)address parameters:(NSDictionary *)parameters completion:(SVHTTPRequestCompletionHandler)block {
SVHTTPRequest *requestObject = [[self alloc] initWithAddress:address method:SVHTTPRequestMethodGET parameters:parameters saveToPath:nil progress:nil completion:block];
[requestObject start];
return requestObject;
}
+ (SVHTTPRequest*)GET:(NSString *)address parameters:(NSDictionary *)parameters saveToPath:(NSString *)savePath progress:(void (^)(float))progressBlock completion:(SVHTTPRequestCompletionHandler)completionBlock {
SVHTTPRequest *requestObject = [[self alloc] initWithAddress:address method:SVHTTPRequestMethodGET parameters:parameters saveToPath:savePath progress:progressBlock completion:completionBlock];
[requestObject start];
return requestObject;
}
+ (SVHTTPRequest*)POST:(NSString *)address parameters:(NSObject *)parameters completion:(SVHTTPRequestCompletionHandler)block {
SVHTTPRequest *requestObject = [[self alloc] initWithAddress:address method:SVHTTPRequestMethodPOST parameters:parameters saveToPath:nil progress:nil completion:block];
[requestObject start];
return requestObject;
}
+ (SVHTTPRequest*)POST:(NSString *)address parameters:(NSObject *)parameters progress:(void (^)(float))progressBlock completion:(void (^)(id, NSHTTPURLResponse*, NSError *))completionBlock {
SVHTTPRequest *requestObject = [[self alloc] initWithAddress:address method:SVHTTPRequestMethodPOST parameters:parameters saveToPath:nil progress:progressBlock completion:completionBlock];
[requestObject start];
return requestObject;
}
+ (SVHTTPRequest*)PUT:(NSString *)address parameters:(NSObject *)parameters completion:(SVHTTPRequestCompletionHandler)block {
SVHTTPRequest *requestObject = [[self alloc] initWithAddress:address method:SVHTTPRequestMethodPUT parameters:parameters saveToPath:nil progress:nil completion:block];
[requestObject start];
return requestObject;
}
+ (SVHTTPRequest*)DELETE:(NSString *)address parameters:(NSDictionary *)parameters completion:(SVHTTPRequestCompletionHandler)block {
SVHTTPRequest *requestObject = [[self alloc] initWithAddress:address method:SVHTTPRequestMethodDELETE parameters:parameters saveToPath:nil progress:nil completion:block];
[requestObject start];
return requestObject;
}
+ (SVHTTPRequest*)HEAD:(NSString *)address parameters:(NSDictionary *)parameters completion:(void (^)(id, NSHTTPURLResponse *, NSError *))block {
SVHTTPRequest *requestObject = [[self alloc] initWithAddress:address method:SVHTTPRequestMethodHEAD parameters:parameters saveToPath:nil progress:nil completion:block];
[requestObject start];
return requestObject;
}
#pragma mark -
- (SVHTTPRequest*)initWithAddress:(NSString *)urlString method:(SVHTTPRequestMethod)method parameters:(NSDictionary *)parameters completion:(SVHTTPRequestCompletionHandler)completionBlock {
return [(id<SVHTTPRequestPrivateMethods>)self initWithAddress:urlString method:method parameters:parameters saveToPath:nil progress:NULL completion:completionBlock];
}
- (SVHTTPRequest*)initWithAddress:(NSString*)urlString method:(SVHTTPRequestMethod)method parameters:(NSDictionary*)parameters saveToPath:(NSString*)savePath progress:(void (^)(float))progressBlock completion:(SVHTTPRequestCompletionHandler)completionBlock {
self = [super init];
self.operationCompletionBlock = completionBlock;
self.operationProgressBlock = progressBlock;
self.operationSavePath = savePath;
self.operationParameters = parameters;
self.saveDataDispatchGroup = dispatch_group_create();
self.saveDataDispatchQueue = dispatch_queue_create("com.samvermette.SVHTTPRequest", DISPATCH_QUEUE_SERIAL);
self.operationRequest = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:urlString]];
// pipeline all but POST and downloads
if(method != SVHTTPRequestMethodPOST && !savePath)
self.operationRequest.HTTPShouldUsePipelining = YES;
if(method == SVHTTPRequestMethodGET)
[self.operationRequest setHTTPMethod:@"GET"];
else if(method == SVHTTPRequestMethodPOST)
[self.operationRequest setHTTPMethod:@"POST"];
else if(method == SVHTTPRequestMethodPUT)
[self.operationRequest setHTTPMethod:@"PUT"];
else if(method == SVHTTPRequestMethodDELETE)
[self.operationRequest setHTTPMethod:@"DELETE"];
else if(method == SVHTTPRequestMethodHEAD)
[self.operationRequest setHTTPMethod:@"HEAD"];
self.state = SVHTTPRequestStateReady;
return self;
}
- (void)addParametersToRequest:(NSObject*)parameters {
NSString *method = self.operationRequest.HTTPMethod;
if([method isEqualToString:@"POST"] || [method isEqualToString:@"PUT"]) {
if(self.sendParametersAsJSON) {
if([parameters isKindOfClass:[NSArray class]] || [parameters isKindOfClass:[NSDictionary class]]) {
[self.operationRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
NSError *jsonError;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:parameters options:0 error:&jsonError];
[self.operationRequest setHTTPBody:jsonData];
}
else
[NSException raise:NSInvalidArgumentException format:@"POST and PUT parameters must be provided as NSDictionary or NSArray when sendParametersAsJSON is set to YES."];
}
else if([parameters isKindOfClass:[NSDictionary class]]) {
__block BOOL hasData = NO;
NSDictionary *paramsDict = (NSDictionary*)parameters;
[paramsDict.allValues enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
if([obj isKindOfClass:[NSData class]])
hasData = YES;
else if(![obj isKindOfClass:[NSString class]] && ![obj isKindOfClass:[NSNumber class]] && ![obj isKindOfClass:[NSArray class]])
[NSException raise:NSInvalidArgumentException format:@"%@ requests only accept NSString NSArray NSNumber parameters.", self.operationRequest.HTTPMethod];
}];
if(!hasData) {
const char *stringData = [[self parameterStringForDictionary:paramsDict] UTF8String];
NSMutableData *postData = [NSMutableData dataWithBytes:stringData length:strlen(stringData)];
[self.operationRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"]; //added by uzys
[self.operationRequest setHTTPBody:postData];
}
else {
NSString *boundary = @"SVHTTPRequestBoundary";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
[self.operationRequest setValue:contentType forHTTPHeaderField: @"Content-Type"];
__block NSMutableData *postData = [NSMutableData data];
__block int dataIdx = 0;
// add string parameters
[paramsDict enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
if(![obj isKindOfClass:[NSData class]]) {
[postData appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", key] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[[NSString stringWithFormat:@"%@", obj] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
} else {
[postData appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
NSString *imageExtension = [obj getImageType];
if(imageExtension != nil) {
[postData appendData:[[NSString stringWithFormat:@"Content-Disposition: attachment; name=\"%@\"; filename=\"userfile%d%x.%@\"\r\n", key,dataIdx,(int)[[NSDate date] timeIntervalSince1970],imageExtension] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[[NSString stringWithFormat:@"Content-Type: image/%@\r\n\r\n",imageExtension] dataUsingEncoding:NSUTF8StringEncoding]];
}
else {
[postData appendData:[[NSString stringWithFormat:@"Content-Disposition: attachment; name=\"%@\"; filename=\"userfile%d%x\"\r\n", key,dataIdx,(int)[[NSDate date] timeIntervalSince1970]] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
}
[postData appendData:obj];
[postData appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
dataIdx++;
}
}];
[postData appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[self.operationRequest setHTTPBody:postData];
}
}
else
[NSException raise:NSInvalidArgumentException format:@"POST and PUT parameters must be provided as NSDictionary when sendParametersAsJSON is set to NO."];
}
else if([parameters isKindOfClass:[NSDictionary class]]) {
NSDictionary *paramsDict = (NSDictionary*)parameters;
NSString *baseAddress = self.operationRequest.URL.absoluteString;
if(paramsDict.count > 0)
baseAddress = [baseAddress stringByAppendingFormat:@"?%@", [self parameterStringForDictionary:paramsDict]];
[self.operationRequest setURL:[NSURL URLWithString:baseAddress]];
}
else
[NSException raise:NSInvalidArgumentException format:@"GET and DELETE parameters must be provided as NSDictionary."];
}
- (NSString*)parameterStringForDictionary:(NSDictionary*)parameters {
NSMutableArray *stringParameters = [NSMutableArray arrayWithCapacity:parameters.count];
[parameters enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
if([obj isKindOfClass:[NSString class]]) {
[stringParameters addObject:[NSString stringWithFormat:@"%@=%@", key, [obj encodedURLParameterString]]];
}
else if([obj isKindOfClass:[NSNumber class]]) {
[stringParameters addObject:[NSString stringWithFormat:@"%@=%@", key, obj]];
}
else if([obj isKindOfClass:[NSArray class]]) {
NSArray *tmp = obj;
for (int i = 0; i < tmp.count; ++i)
{
[stringParameters addObject:[NSString stringWithFormat:@"%@=%@", key, tmp[i]]];
}
}
else
[NSException raise:NSInvalidArgumentException format:@"%@ requests only accept NSString, NSNumber NSArray and NSData parameters.", self.operationRequest.HTTPMethod];
}];
return [stringParameters componentsJoinedByString:@"&"];
}
- (void)signRequestWithUsername:(NSString*)username password:(NSString*)password {
NSString *authStr = [NSString stringWithFormat:@"%@:%@", username, password];
NSData *authData = [authStr dataUsingEncoding:NSASCIIStringEncoding];
NSString *authValue = [NSString stringWithFormat:@"Basic %@", [authData base64EncodingWithLineLength:140]];
[self.operationRequest setValue:authValue forHTTPHeaderField:@"Authorization"];
}
- (void)setValue:(NSString *)value forHTTPHeaderField:(NSString *)field {
[self.operationRequest setValue:value forHTTPHeaderField:field];
}
- (void)setTimeoutTimer:(NSTimer *)newTimer {
if(_timeoutTimer)
[_timeoutTimer invalidate], _timeoutTimer = nil;
if(newTimer)
_timeoutTimer = newTimer;
}
#pragma mark - NSOperation methods
- (void)start {
if(self.isCancelled) {
[self finish];
return;
}
#if TARGET_OS_IPHONE
// all requests should complete and run completion block unless we explicitely cancel them.
self.backgroundTaskIdentifier = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
if(self.backgroundTaskIdentifier != UIBackgroundTaskInvalid) {
[[UIApplication sharedApplication] endBackgroundTask:self.backgroundTaskIdentifier];
self.backgroundTaskIdentifier = UIBackgroundTaskInvalid;
}
}];
#endif
dispatch_async(dispatch_get_main_queue(), ^{
[self increaseTaskCount];
});
if(self.operationParameters)
[self addParametersToRequest:self.operationParameters];
if(self.userAgent)
[self.operationRequest setValue:self.userAgent forHTTPHeaderField:@"User-Agent"];
else if(defaultUserAgent)
[self.operationRequest setValue:defaultUserAgent forHTTPHeaderField:@"User-Agent"];
[self willChangeValueForKey:@"isExecuting"];
self.state = SVHTTPRequestStateExecuting;
[self didChangeValueForKey:@"isExecuting"];
if(self.operationSavePath) {
[[NSFileManager defaultManager] createFileAtPath:self.operationSavePath contents:nil attributes:nil];
self.operationFileHandle = [NSFileHandle fileHandleForWritingAtPath:self.operationSavePath];
} else {
self.operationData = [[NSMutableData alloc] init];
self.timeoutTimer = [NSTimer scheduledTimerWithTimeInterval:self.timeoutInterval target:self selector:@selector(requestTimeout) userInfo:nil repeats:NO];
[self.operationRequest setTimeoutInterval:self.timeoutInterval];
}
[self.operationRequest setCachePolicy:self.cachePolicy];
self.operationConnection = [[NSURLConnection alloc] initWithRequest:self.operationRequest delegate:self startImmediately:NO];
NSOperationQueue *currentQueue = [NSOperationQueue currentQueue];
BOOL inBackgroundAndInOperationQueue = (currentQueue != nil && currentQueue != [NSOperationQueue mainQueue]);
NSRunLoop *targetRunLoop = (inBackgroundAndInOperationQueue) ? [NSRunLoop currentRunLoop] : [NSRunLoop mainRunLoop];
if(self.operationSavePath) // schedule on main run loop so scrolling doesn't prevent UI updates of the progress block
[self.operationConnection scheduleInRunLoop:targetRunLoop forMode:NSRunLoopCommonModes];
else
[self.operationConnection scheduleInRunLoop:targetRunLoop forMode:NSDefaultRunLoopMode];
[self.operationConnection start];
#if !(defined SVHTTPREQUEST_DISABLE_LOGGING)
NSLog(@"[%@] %@", self.operationRequest.HTTPMethod, self.operationRequest.URL.absoluteString);
#endif
// make NSRunLoop stick around until operation is finished
if(inBackgroundAndInOperationQueue) {
self.operationRunLoop = CFRunLoopGetCurrent();
CFRunLoopRun();
}
}
// private method; not part of NSOperation
- (void)finish {
[self.operationConnection cancel];
self.operationConnection = nil;
[self decreaseTaskCount];
#if TARGET_OS_IPHONE
if(self.backgroundTaskIdentifier != UIBackgroundTaskInvalid) {
[[UIApplication sharedApplication] endBackgroundTask:self.backgroundTaskIdentifier];
self.backgroundTaskIdentifier = UIBackgroundTaskInvalid;
}
#endif
[self willChangeValueForKey:@"isExecuting"];
[self willChangeValueForKey:@"isFinished"];
self.state = SVHTTPRequestStateFinished;
[self didChangeValueForKey:@"isExecuting"];
[self didChangeValueForKey:@"isFinished"];
}
- (void)cancel {
if(![self isExecuting])
return;
[super cancel];
self.timeoutTimer = nil;
[self finish];
}
- (BOOL)isConcurrent {
return YES;
}
- (BOOL)isFinished {
return self.state == SVHTTPRequestStateFinished;
}
- (BOOL)isExecuting {
return self.state == SVHTTPRequestStateExecuting;
}
- (SVHTTPRequestState)state {
@synchronized(self) {
return _state;
}
}
- (void)setState:(SVHTTPRequestState)newState {
@synchronized(self) {
[self willChangeValueForKey:@"state"];
_state = newState;
[self didChangeValueForKey:@"state"];
}
}
#pragma mark -
#pragma mark Delegate Methods
- (void)requestTimeout {
NSURL *failingURL = self.operationRequest.URL;
NSDictionary *userInfo = [NSDictionary dictionaryWithObjectsAndKeys:
@"The operation timed out.", NSLocalizedDescriptionKey,
failingURL, NSURLErrorFailingURLErrorKey,
failingURL.absoluteString, NSURLErrorFailingURLStringErrorKey, nil];
NSError *timeoutError = [NSError errorWithDomain:NSURLErrorDomain code:NSURLErrorTimedOut userInfo:userInfo];
[self connection:nil didFailWithError:timeoutError];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
self.expectedContentLength = response.expectedContentLength;
self.receivedContentLength = 0;
self.operationURLResponse = (NSHTTPURLResponse*)response;
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
dispatch_group_async(self.saveDataDispatchGroup, self.saveDataDispatchQueue, ^{
if(self.operationSavePath) {
@try { //writeData: can throw exception when there's no disk space. Give an error, don't crash
[self.operationFileHandle writeData:data];
}
@catch (NSException *exception) {
[self.operationConnection cancel];
NSError *writeError = [NSError errorWithDomain:@"SVHTTPRequestWriteError" code:0 userInfo:exception.userInfo];
[self callCompletionBlockWithResponse:nil error:writeError];
}
}
else
[self.operationData appendData:data];
});
if(self.operationProgressBlock) {
//If its -1 that means the header does not have the content size value
if(self.expectedContentLength != -1) {
self.receivedContentLength += data.length;
self.operationProgressBlock(self.receivedContentLength/self.expectedContentLength);
} else {
//we dont know the full size so always return -1 as the progress
self.operationProgressBlock(-1);
}
}
}
- (void)connection:(NSURLConnection *)connection didSendBodyData:(NSInteger)bytesWritten totalBytesWritten:(NSInteger)totalBytesWritten totalBytesExpectedToWrite:(NSInteger)totalBytesExpectedToWrite {
if(self.operationProgressBlock && [self.operationRequest.HTTPMethod isEqualToString:@"POST"]) {
self.operationProgressBlock((float)totalBytesWritten/(float)totalBytesExpectedToWrite);
}
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
dispatch_group_notify(self.saveDataDispatchGroup, self.saveDataDispatchQueue, ^{
id response = [NSData dataWithData:self.operationData];
NSError *error = nil;
if ([[self.operationURLResponse MIMEType] isEqualToString:@"application/json"]) {
if(self.operationData && self.operationData.length > 0) {
NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingAllowFragments error:&error];
if(jsonObject)
response = jsonObject;
}
}
[self callCompletionBlockWithResponse:response error:error];
});
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[self callCompletionBlockWithResponse:nil error:error];
}
- (void)callCompletionBlockWithResponse:(id)response error:(NSError *)error {
self.timeoutTimer = nil;
if(self.operationRunLoop)
CFRunLoopStop(self.operationRunLoop);
dispatch_async(dispatch_get_main_queue(), ^{
NSError *serverError = error;
if(!serverError && self.operationURLResponse.statusCode == 500) {
serverError = [NSError errorWithDomain:NSURLErrorDomain
code:NSURLErrorBadServerResponse
userInfo:[NSDictionary dictionaryWithObjectsAndKeys:
@"Bad Server Response.", NSLocalizedDescriptionKey,
self.operationRequest.URL, NSURLErrorFailingURLErrorKey,
self.operationRequest.URL.absoluteString, NSURLErrorFailingURLStringErrorKey, nil]];
}
if(self.operationCompletionBlock && !self.isCancelled)
self.operationCompletionBlock(response, self.operationURLResponse, serverError);
[self finish];
});
}
@end
// Created by Jon Crosby on 10/19/07.
// Copyright 2007 Kaboomerang LLC. All rights reserved.
@implementation NSString (SVHTTPRequest)
- (NSString*)encodedURLParameterString {
NSString *result = (__bridge_transfer NSString*)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
(__bridge CFStringRef)self,
NULL,
CFSTR(":/=,!$&'()*+;[]@#?^%\"`<>{}\\|~ "),
kCFStringEncodingUTF8);
return result;
}
@end
// Created by khammond on Mon Oct 29 2001.
// Formatted by Timothy Hatcher on Sun Jul 4 2004.
// Copyright (c) 2001 Kyle Hammond. All rights reserved.
// Original development by Dave Winer.
static char encodingTable[64] = {
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',
'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',
'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',
'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/' };
@implementation NSData (SVHTTPRequest)
- (NSString *)base64EncodingWithLineLength:(unsigned int) lineLength {
const unsigned char *bytes = [self bytes];
NSMutableString *result = [NSMutableString stringWithCapacity:[self length]];
unsigned long ixtext = 0;
unsigned long lentext = [self length];
long ctremaining = 0;
unsigned char inbuf[3], outbuf[4];
short i = 0;
unsigned int charsonline = 0;
short ctcopy = 0;
unsigned long ix = 0;
while( YES ) {
ctremaining = lentext - ixtext;
if( ctremaining <= 0 ) break;
for( i = 0; i < 3; i++ ) {
ix = ixtext + i;
if( ix < lentext ) inbuf[i] = bytes[ix];
else inbuf [i] = 0;
}
outbuf [0] = (inbuf [0] & 0xFC) >> 2;
outbuf [1] = ((inbuf [0] & 0x03) << 4) | ((inbuf [1] & 0xF0) >> 4);
outbuf [2] = ((inbuf [1] & 0x0F) << 2) | ((inbuf [2] & 0xC0) >> 6);
outbuf [3] = inbuf [2] & 0x3F;
ctcopy = 4;
switch( ctremaining ) {
case 1:
ctcopy = 2;
break;
case 2:
ctcopy = 3;
break;
}
for( i = 0; i < ctcopy; i++ )
[result appendFormat:@"%c", encodingTable[outbuf[i]]];
for( i = ctcopy; i < 4; i++ )
[result appendFormat:@"%c",'='];
ixtext += 3;
charsonline += 4;
}
return result;
}
- (BOOL)isJPG {
if (self.length > 4) {
unsigned char buffer[4];
[self getBytes:&buffer length:4];
return buffer[0]==0xff &&
buffer[1]==0xd8 &&
buffer[2]==0xff &&
buffer[3]==0xe0;
}
return NO;
}
- (BOOL)isPNG {
if (self.length > 4) {
unsigned char buffer[4];
[self getBytes:&buffer length:4];
return buffer[0]==0x89 &&
buffer[1]==0x50 &&
buffer[2]==0x4e &&
buffer[3]==0x47;
}
return NO;
}
- (BOOL)isGIF {
if(self.length >3) {
unsigned char buffer[4];
[self getBytes:&buffer length:4];
return buffer[0]==0x47 &&
buffer[1]==0x49 &&
buffer[2]==0x46; //Signature ASCII 'G','I','F'
}
return NO;
}
- (NSString *)getImageType {
NSString *ret;
if([self isJPG]) {
ret=@"jpg";
}
else if([self isGIF]) {
ret=@"gif";
}
else if([self isPNG]) {
ret=@"png";
}
else {
ret=nil;
}
return ret;
}
@end
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