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// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#import "HTTPMultipartUpload.h"
#import "GTMDefines.h"
#import "encoding_util.h"
@interface HTTPMultipartUpload (PrivateMethods)
- (NSString*)multipartBoundary;
// Each of the following methods will append the starting multipart boundary,
// but not the ending one.
- (NSData*)formDataForKey:(NSString*)key value:(NSString*)value;
- (NSData*)formDataForFileContents:(NSData*)contents name:(NSString*)name;
- (NSData*)formDataForFile:(NSString*)file name:(NSString*)name;
@end
@implementation HTTPMultipartUpload
//=============================================================================
#pragma mark -
#pragma mark || Private ||
//=============================================================================
- (NSString*)multipartBoundary {
// The boundary has 27 '-' characters followed by 16 hex digits
return [NSString
stringWithFormat:@"---------------------------%08X%08X", rand(), rand()];
}
//=============================================================================
- (NSData*)formDataForKey:(NSString*)key value:(NSString*)value {
NSMutableData* data = [NSMutableData data];
[self appendBoundaryData:data];
NSString* escaped = PercentEncodeNSString(key);
NSString* fmt = @"Content-Disposition: form-data; name=\"%@\"\r\n\r\n%@\r\n";
NSString *form = [NSString stringWithFormat:fmt, escaped, value];
[data appendData:[form dataUsingEncoding:NSUTF8StringEncoding]];
return data;
}
//=============================================================================
- (void)appendBoundaryData:(NSMutableData*)data {
NSString* fmt = @"--%@\r\n";
NSString* pre = [NSString stringWithFormat:fmt, boundary_];
[data appendData:[pre dataUsingEncoding:NSUTF8StringEncoding]];
}
//=============================================================================
#pragma mark -
#pragma mark || Public ||
//=============================================================================
- (id)initWithURL:(NSURL*)url {
if ((self = [super initWithURL:url])) {
boundary_ = [[self multipartBoundary] retain];
files_ = [[NSMutableDictionary alloc] init];
}
return self;
}
//=============================================================================
- (void)dealloc {
[parameters_ release];
[files_ release];
[boundary_ release];
[super dealloc];
}
//=============================================================================
- (void)setParameters:(NSDictionary*)parameters {
if (parameters != parameters_) {
[parameters_ release];
parameters_ = [parameters copy];
}
}
//=============================================================================
- (NSDictionary*)parameters {
return parameters_;
}
//=============================================================================
- (void)addFileAtPath:(NSString*)path name:(NSString*)name {
[files_ setObject:path forKey:name];
}
//=============================================================================
- (void)addFileContents:(NSData*)data name:(NSString*)name {
[files_ setObject:data forKey:name];
}
//=============================================================================
- (NSDictionary*)files {
return files_;
}
//=============================================================================
- (NSString*)HTTPMethod {
return @"POST";
}
//=============================================================================
- (NSString*)contentType {
return [NSString
stringWithFormat:@"multipart/form-data; boundary=%@", boundary_];
}
//=============================================================================
- (NSData*)bodyData {
NSMutableData* postBody = [NSMutableData data];
// Add any parameters to the message
NSArray* parameterKeys = [parameters_ allKeys];
NSString* key;
NSInteger count = [parameterKeys count];
for (NSInteger i = 0; i < count; ++i) {
key = [parameterKeys objectAtIndex:i];
[postBody appendData:[self formDataForKey:key
value:[parameters_ objectForKey:key]]];
}
// Add any files to the message
NSArray* fileNames = [files_ allKeys];
for (NSString* name in fileNames) {
// First append boundary
[self appendBoundaryData:postBody];
// Then the formdata
id fileOrData = [files_ objectForKey:name];
[HTTPRequest appendFileToBodyData:postBody
withName:name
withFileOrData:fileOrData];
}
NSString* epilogue = [NSString stringWithFormat:@"\r\n--%@--\r\n", boundary_];
[postBody appendData:[epilogue dataUsingEncoding:NSUTF8StringEncoding]];
return postBody;
}
@end
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