接下来，我们接着去学习怎样去接收处理web上传的数据
1 首先我们创建一个
@interface WTZHTTPConnection : HTTPConnection
在这个类中我们用于处理接受文件并存储到app文档
同一时候不要忘记了设置httpserver的Connectio类
[httpServer setConnectionClass:[WTZHTTPConnectionclass]];
所有的代码例如以下
.h文件
#define UPLOAD_FILE_PROGRESS @"uploadfileprogress" #import <Foundation/Foundation.h>
#import "HTTPConnection.h" @interface WTZHTTPConnection : HTTPConnection
{
int dataStartIndex;
NSMutableArray *multipartData;
BOOL postHeaderOK;
} - (BOOL) isBeginOfOctetStream; @end
.m文件
#import "WTZHTTPConnection.h"
@implementation WTZHTTPConnection
- (void)dealloc {
[multipartData release];
[super dealloc];
}
//扩展HTTPServer支持的请求类型，默认支持GET，HEAD。不支持POST
- (BOOL)supportsMethod:(NSString *)method atPath:(NSString *)relativePath
{
if ([@"POST" isEqualToString:method])
{
return YES;
}
return [super supportsMethod:method atPath:relativePath];
}
//处量返回的response数据
- (NSObject<HTTPResponse> *)httpResponseForMethod:(NSString *)method URI:(NSString *)path
{
return [super httpResponseForMethod:method URI:path];
}
//处理POST请求提交的数据流(以下方法是改自 Andrew Davidson的类)
- (void)processDataChunk:(NSData *)postDataChunk
{
NSLog(@"processDataChunk function called");
//multipartData初始化不放在init函数中, 当前相似乎不经init函数初始化
if (multipartData == nil) {
multipartData = [[NSMutableArray alloc] init];
}
//处理multipart/form-data的POST请求中Body数据集中的表单值域并创建文件
if (!postHeaderOK)
{
//0x0A0D: 换行符
UInt16 separatorBytes = 0x0A0D;
NSData* separatorData = [NSData dataWithBytes:&separatorBytes length:2];
int l = (int)[separatorData length];
for (int i = 0; i < [postDataChunk length] - l; i++)
{
//每次取两个字节 比对下看看是否是换行
NSRange searchRange = {i, l};
//假设是换行符则进行例如以下处理
if ([[postDataChunk subdataWithRange:searchRange] isEqualToData:separatorData])
{
//获取dataStartIndex标识的上一个换行位置到当前换行符之间的数据的Range
NSRange newDataRange = {dataStartIndex, i - dataStartIndex};
//dataStartIndex标识的上一个换行位置到移到当前换行符位置
dataStartIndex = i + l;
i += l - 1;
//获取dataStartIndex标识的上一个换行位置到当前换行符之间的数据
NSData *newData = [postDataChunk subdataWithRange:newDataRange];
//假设newData不为空或还没有处理完multipart/form-data中表单变量值域则继续处理剩下的表单值域数据
if ([newData length] || ![self isBeginOfOctetStream])
{
if ([newData length]) {
[multipartData addObject:newData];
}
}
else
{
//将标识处理完multipart/form-data中表单变量值域的postHeaderOK变量设置为TRUE;
postHeaderOK = TRUE;
//这里临时写成硬编码 弊端:每次添加表单变量都要改这里的数值
//获取Content-Disposition: form-data; name="xxx"; filename="xxx"
NSString* postInfo = [[NSString alloc] initWithBytes:[[multipartData objectAtIndex:4] bytes]
length:[[multipartData objectAtIndex:4] length]
encoding:NSUTF8StringEncoding];
NSLog(@"postInfo is:%@", postInfo);
NSArray* postInfoComponents = [postInfo componentsSeparatedByString:@"; filename="];
postInfoComponents = [[postInfoComponents lastObject] componentsSeparatedByString:@"\""];
NSLog(@"postInfoComponents0 :%@",postInfoComponents);
if ([postInfoComponents count]<2)
{
return;
}
postInfoComponents = [[postInfoComponents objectAtIndex:1] componentsSeparatedByString:@"\\"];
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString* filename = [documentPath stringByAppendingPathComponent:[postInfoComponents lastObject]];
NSLog(@"filename :%@",filename);
NSRange fileDataRange = {dataStartIndex, [postDataChunk length] - dataStartIndex};
[[NSFileManager defaultManager] createFileAtPath:filename contents:[postDataChunk subdataWithRange:fileDataRange] attributes:nil];
NSFileHandle *file = [[NSFileHandle fileHandleForUpdatingAtPath:filename] retain];
if (file)
{
[file seekToEndOfFile];
[multipartData addObject:file];
}
[postInfo release];
break;
}
}
}
}
else //表单值域已经处理过了 这之后的数据全是文件数据流
{
[(NSFileHandle*)[multipartData lastObject] writeData:postDataChunk];
}
float uploadProgress = (double)requestContentLengthReceived / requestContentLength;
//实际应用时 当前类的实例是相当于单例一样被引用(由于仅仅被实例化一次)
if (uploadProgress >= 1.0) {
postHeaderOK = NO;
[multipartData release];
multipartData = nil;
}
[[NSNotificationCenter defaultCenter] postNotificationName:UPLOAD_FILE_PROGRESS object:[NSNumber numberWithFloat:uploadProgress] userInfo:nil];
}
//检查是否已经处理完了multipart/form-data表单中的表单变量
- (BOOL) isBeginOfOctetStream
{
NSString *octetStreamFlag = @"Content-Type: application/octet-stream";
NSString *findData = [[NSString alloc] initWithData:(NSData *)[multipartData lastObject] encoding:NSUTF8StringEncoding];
for (NSData *d in multipartData) {
NSString *temp = [[[NSString alloc] initWithData:d encoding:NSUTF8StringEncoding] autorelease] ;
NSLog(@"multipartData items: %@", temp);
}
//假设已经处理完了multipart/form-data表单中的表单变量
if ( findData != nil && [findData length] > 0 )
{
NSLog(@"findData is :%@\n octetStreamFlag is :%@", findData, octetStreamFlag);
if ([octetStreamFlag isEqualToString:findData]) {
NSLog(@"multipart/form-data 变量值域数据处理完成");
[findData release];
return YES;
}
[findData release];
return NO;
}
return NO;
}
@end
基本的代码就在 processDataChunk，我们仅仅须要在这里面处理数据就可以
以上代码主要转自github上 https://github.com/willonboy/CocoaHTTPServer---multipart-form-data点击打开链接
大家能够下载源代码研究
下章将要解说 web js代码