iOS中基于WebView的HTML网页离线访问技术的实现

其实就是MVC模式，视图在在线、离线时可以共用，控制器在在线时是由服务器端实现的，而离线时则是由本地Obj-C代码实现。具体实现方式为采用Mongoose实现。

代码为：

mongoose.h

mongoose.c

 附件

https://files.cnblogs.com/files/lohcve/Mongoose.zip

调用方式：

HttpServer.h

//
//  NSObject+HttpServer.h
//  sxypt
//
//  Created by 李 泽波 on 13-1-9.
//  Copyright (c) 2013年 xxx有限公司. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "mongoose.h"

@interface HttpServer : NSObject
{
    struct mg_context *MG_CTX;//http server
}

@property struct mg_context *MG_CTX;

- (void)http_server_start;
- (void)http_server_stop;
- (void)test_http_server;

@end

HttpServer.m

//
//  NSObject+HttpServer.m
//  sxypt
//
//  Created by 李 泽波 on 13-1-9.
//  Copyright (c) 2013年 xxx有限公司. All rights reserved.
//

#import "HttpServer.h"
#import "Constant.h"

@implementation HttpServer

@synthesize MG_CTX;

- (id) initHttpServer
{
    self = [super init];
    if(self){
        
    }
    return self;
}

- (void)http_server_start
{
    NSString *path = [NSString stringWithFormat:@"%@%@", [[NSBundle mainBundle] resourcePath], OfflineWebRootPath];
    char *rootPath = (char *)[path UTF8String];
    char *serverPort = (char *)[OfflineWebServerPort UTF8String];
    const char *options[] = {
        "document_root", rootPath,
        "listening_ports", serverPort,
        NULL
    };
    self.MG_CTX = mg_start(&callback, NULL, options);
    NSLog(@"http server start at port: %@", OfflineWebServerPort);
}

- (void)http_server_stop
{
    mg_stop(self.MG_CTX);
    NSLog(@"http server stoped");
}

- (void)test_http_server
{
    NSString *urlString = [NSString stringWithFormat:@"%@:%@%@", OfflineWebServer, OfflineWebServerPort, @"/index.html"];
    NSURL *url = [NSURL URLWithString:urlString];
    NSString *response = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
    NSLog(@"%@", response);
}

void *callback(enum mg_event event, struct mg_connection *conn)
{
    const struct mg_request_info *request_info = mg_get_request_info(conn);
    
    if (event == MG_NEW_REQUEST) {
        char content[1024];
        int content_length = snprintf(content, sizeof(content),
                                      "Hello from mongoose! Remote port: %d",
                                      request_info->remote_port);
        mg_printf(conn,
                  "HTTP/1.1 200 OK
"
                  "Content-Type: text/plain
"
                  "Content-Length: %d
"        // Always set Content-Length
                  "
"
                  "%s",
                  content_length, content);
        // Mark as processed
        return "";
    } else {
        return NULL;
    }
}

@end