jyiosapp/ios/JianYuIOS/JianYuIOS/BaseClass1/NSURLProtocolCustom.m

//
//  NSURLProtocolCustom.m
//
//  Created by shuoyu liu on 2017/1/16.
//  Copyright © 2017年 shuoyu liu. All rights reserved.
//

#import "NSURLProtocolCustom.h"
#import <UIKit/UIKit.h>
#import "LXMD5.h"

static NSString* const protocolKey = @"protocolKey";
@interface NSURLProtocolCustom ()<NSURLSessionDelegate>
@property (nonnull,strong) NSURLSessionDataTask *task;

@end


@implementation NSURLProtocolCustom

+ (BOOL)canInitWithRequest:(NSURLRequest *)request {
    if ([NSURLProtocol propertyForKey:protocolKey inRequest:request]) {
        return NO;
    }
    NSString * url = request.URL.absoluteString;
    //&&![url containsString:@"common.js"]
    if ([url hasPrefix:@"res://"]) {
        NSLog(@"协议拦截成功：%@",url);
        return YES;
    }
    return NO;
}


+ (NSURLRequest *)canonicalRequestForRequest:(NSURLRequest *)request {

    NSMutableURLRequest *mutableReqeust = [request mutableCopy];
    if ([mutableReqeust.URL host].length == 0) {
        return mutableReqeust;
    }
    NSString *curStr = [mutableReqeust.URL absoluteString];
    // 替换域名
    NSString *urlString = [curStr stringByReplacingOccurrencesOfString:@"res://" withString:@"http://"];
    NSURL *urlll = [NSURL URLWithString:urlString];
    mutableReqeust.URL = urlll;
    return mutableReqeust;
}
    
- (void)startLoading
{
    //判断是否包含版本--
    NSString *curUrl = [NSString stringWithFormat:@"%@",self.request.URL.absoluteString];
    if ([curUrl containsString:@"?v="]) {
        NSString *verName = @"";
        NSLog(@"有相关版本号url:%@",curUrl);
        verName =[curUrl componentsSeparatedByString:@"?v="].lastObject;
        NSLog(@"版本目录名：%@",verName);
        //查询缓存目录
        NSString *pathName = [[[GlobalData shareInstance]getDocumentPath] stringByAppendingPathComponent:verName];
         //如果无则创建否则
        if (![[GlobalData shareInstance] creatDir:pathName]) {
            NSLog(@"文件夹已存在");
        }else {
            NSLog(@"文件夹不存在，创建");
        }
        NSString *filePath = [pathName stringByAppendingPathComponent:[LXMD5 md532BitLower:curUrl]];
        NSData *fileData = [[GlobalData shareInstance] readFile:filePath];
        if (fileData!=nil) {//存在查询数据
            NSLog(@"沙盒有数据");
            NSURLResponse* response = [[NSURLResponse alloc] initWithURL:self.request.URL MIMEType:nil expectedContentLength:fileData.length textEncodingName:nil];
            [self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageNotAllowed];
            [self.client URLProtocol:self didLoadData:fileData];
            [self.client URLProtocolDidFinishLoading:self];
        }else {
            //沙盒添加数据
            NSLog(@"沙盒无数据");
            NSData *data = [NSData dataWithContentsOfURL:self.request.URL];
            [[GlobalData shareInstance] creatFile:filePath withData:data];
        
            
//            NSData *curData = [[GlobalData shareInstance] readFile:filePath];
            
            
            NSURLResponse* response = [[NSURLResponse alloc] initWithURL:self.request.URL MIMEType:nil expectedContentLength:data.length textEncodingName:nil];
            [self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageNotAllowed];
            [self.client URLProtocol:self didLoadData:data];
            [self.client URLProtocolDidFinishLoading:self];
        }
        
        
        
        
    }else {
        //查询项目目录
        NSString *fileName = [super.request.URL.absoluteString componentsSeparatedByString:@"/"].lastObject;
        NSLog(@"无V当前fileName:%@",fileName);
        NSString *path = [[NSBundle mainBundle] pathForResource:fileName ofType:nil];
        if (path) {
            NSLog(@"项目目录有数据");
            NSData *data = [NSData dataWithContentsOfFile:path];
            NSURLResponse* response = [[NSURLResponse alloc] initWithURL:self.request.URL MIMEType:nil expectedContentLength:data.length textEncodingName:nil];
            [self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageAllowed];
            [self.client URLProtocol:self didLoadData:data];
            [self.client URLProtocolDidFinishLoading:self];
        }else {
            NSLog(@"项目目录本地无数据");
            NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:nil];
            self.task = [session dataTaskWithRequest:self.request];
            [self.task resume];
        }
    }
    
    
    
    
    
    
    
}
- (void)stopLoading {
    if (self.task != nil) {
        [self.task cancel];
    }
}

- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler {
    [[self client] URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageAllowed];
    
    completionHandler(NSURLSessionResponseAllow);
}

- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data {
    [[self client] URLProtocol:self didLoadData:data];
}

- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(nullable NSError *)error {
    [self.client URLProtocolDidFinishLoading:self];
}

@end