写在最开始，项目中需要监听Weex所有网络请求，设置cookie，监听网络异常，帮助团队查找weex网络问题等等，以及更好的扩展weex网络请求模块，因此在项目中实现WXSJResourceRequestHandlerDefaultImpl来处理weex网络请求。
版本
WeexSDK版本号：0.13.0
一、Weex注册Handler
在初始化WeexSDK时，需要注册自定义协议WXSJResourceRequestHandlerDefaultImpl用来实现Weex请求。
其余为项目中，业务需要的模块、协议、组件。
[WXSDKEngine initSDKEnvironment];
//设置Log输出等级：调试环境默认为Debug，正式发布会自动关闭。
// [WXLog setLogLevel:WXLogLevelAll];
// [WXDebugTool setDebug:YES];
[WXSDKEngine registerModule:@"shopBase" withClass:[BaseModule class]];
[WXSDKEngine registerModule:@"shopModal" withClass:[ShopModule class]];
[WXSDKEngine registerHandler:[WXImgLoaderDefaultImpl new] withProtocol:@protocol(WXImgLoaderProtocol)];
[WXSDKEngine registerHandler:[WXSJNetworkDefaultlmpl new] withProtocol:@protocol(WXURLRewriteProtocol)];
[WXSDKEngine registerHandler:[WXSJResourceRequestHandlerDefaultImpl new] withProtocol:@protocol(WXResourceRequestHandler)];
[WXSDKEngine registerComponent:@"a" withClass:NSClassFromString(@"WXPushComponent")];
[WXSDKEngine registerComponent:@"pager" withClass:NSClassFromString(@"WXSJPagerComponent")];
二、WXSJResourceRequestHandlerDefaultImpl的实现
WXSJResourceRequestHandlerDefaultImpl.h文件中
此处的WeexHeader.h为项目中weex头文件汇总，按需导入就好。
#import <Foundation/Foundation.h>
#import "WeexHeader.h"
@interface WXSJResourceRequestHandlerDefaultImpl : NSObject <WXResourceRequestHandler>
@end
WXSJResourceRequestHandlerDefaultImpl.m文件中
使用NSURLSession实现底层Weex网络请求，所有网络请求都会经过这里。
SJCookieHandle文件为项目中引用，对cookie进行处理的。（项目中，原生使用AFNNetwork携带cookie进行网络请求，Weex使用NSURLSession携带cookie网络请求，来确定用户身份）
#import "WXSJResourceRequestHandlerDefaultImpl.h"
#import "WXSJThreadSafeMutableDictionary.h"
//#import "SJCookieHandle.h"
@interface WXSJResourceRequestHandlerDefaultImpl () <NSURLSessionDataDelegate>
@end
@implementation WXSJResourceRequestHandlerDefaultImpl{
NSURLSession *_session;
WXSJThreadSafeMutableDictionary<NSURLSessionDataTask *, id<WXResourceRequestDelegate>> *_delegates;
}
#pragma mark - WXResourceRequestHandler
// 发起请求
- (void)sendRequest:(WXResourceRequest *)request withDelegate:(id<WXResourceRequestDelegate>)delegate{
// 请求前setCookies
// [[SJCookieHandle initSJCookieHandle] setCookiesFromArr];
if (!_session) {
NSURLSessionConfiguration *urlSessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
if ([WXAppConfiguration customizeProtocolClasses].count > 0) {
NSArray *defaultProtocols = urlSessionConfig.protocolClasses;
urlSessionConfig.protocolClasses = [[WXAppConfiguration customizeProtocolClasses] arrayByAddingObjectsFromArray:defaultProtocols];
}
_session = [NSURLSession sessionWithConfiguration:urlSessionConfig
delegate:self
delegateQueue:[NSOperationQueue mainQueue]];
_delegates = [WXSJThreadSafeMutableDictionary new];
}
NSURLSessionDataTask *task = [_session dataTaskWithRequest:request];
request.taskIdentifier = task;
[_delegates setObject:delegate forKey:task];
[task resume];
}
// 取消请求
- (void)cancelRequest:(WXResourceRequest *)request{
if ([request.taskIdentifier isKindOfClass:[NSURLSessionTask class]]) {
NSURLSessionTask *task = (NSURLSessionTask *)request.taskIdentifier;
[task cancel];
[_delegates removeObjectForKey:task];
}
}
#pragma mark - NSURLSessionTaskDelegate & NSURLSessionDataDelegate
// 发送数据的进度
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend{
id<WXResourceRequestDelegate> delegate = [_delegates objectForKey:task];
[delegate request:(WXResourceRequest *)task.originalRequest didSendData:bytesSent totalBytesToBeSent:totalBytesExpectedToSend];
}
// 接受到服务响应
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)task didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler{
id<WXResourceRequestDelegate> delegate = [_delegates objectForKey:task];
[delegate request:(WXResourceRequest *)task.originalRequest didReceiveResponse:(WXResourceResponse *)response];
completionHandler(NSURLSessionResponseAllow);
}
// 接收到服务器响应数据
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)task didReceiveData:(NSData *)data{
id<WXResourceRequestDelegate> delegate = [_delegates objectForKey:task];
[delegate request:(WXResourceRequest *)task.originalRequest didReceiveData:data];
}
// 请求完成（成功或失败）
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error{
id<WXResourceRequestDelegate> delegate = [_delegates objectForKey:task];
if (error) {
[delegate request:(WXResourceRequest *)task.originalRequest didFailWithError:error];
}else {
// 请求后saveCacheCookie
// [[SJCookieHandle initSJCookieHandle] saveCacheCookie];
[delegate requestDidFinishLoading:(WXResourceRequest *)task.originalRequest];
}
[_delegates removeObjectForKey:task];
[self startWeexNetworkMonitoringErrorFeedBackWithTask:task error:error];
}
/*
#ifdef __IPHONE_10_0
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didFinishCollectingMetrics:(NSURLSessionTaskMetrics *)metrics
{
id<WXResourceRequestDelegate> delegate = [_delegates objectForKey:task];
[delegate request:(WXResourceRequest *)task.originalRequest didFinishCollectingMetrics:metrics];
}
#endif
*/
WXSJThreadSafeMutableDictionary
三、依赖WXSJThreadSafeMutableDictionary
Weex官方Demo中实现的线程安全的MutableDictionary，实现Weex网络请求需要依赖这个文件，直接Copy就好。
WXSJThreadSafeMutableDictionary.h中
#import <Foundation/Foundation.h>
@interface WXSJThreadSafeMutableDictionary<KeyType, ObjectType> : NSMutableDictionary
@end
WXSJThreadSafeMutableDictionary.m中
#import "WXSJThreadSafeMutableDictionary.h"
@interface WXSJThreadSafeMutableDictionary ()
@property (nonatomic, strong) dispatch_queue_t queue;
@property (nonatomic, strong) NSMutableDictionary* dict;
@end
@implementation WXSJThreadSafeMutableDictionary
- (instancetype)initCommon
{
self = [super init];
if (self) {
NSString* uuid = [NSString stringWithFormat:@"com.taobao.weex.dictionary_%p", self];
_queue = dispatch_queue_create([uuid UTF8String], DISPATCH_QUEUE_CONCURRENT);
}
return self;
}
- (instancetype)init
{
self = [self initCommon];
if (self) {
_dict = [NSMutableDictionary dictionary];
}
return self;
}
- (instancetype)initWithCapacity:(NSUInteger)numItems
{
self = [self initCommon];
if (self) {
_dict = [NSMutableDictionary dictionaryWithCapacity:numItems];
}
return self;
}
- (NSDictionary *)initWithContentsOfFile:(NSString *)path
{
self = [self initCommon];
if (self) {
_dict = [NSMutableDictionary dictionaryWithContentsOfFile:path];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder
{
self = [self initCommon];
if (self) {
_dict = [[NSMutableDictionary alloc] initWithCoder:aDecoder];
}
return self;
}
- (instancetype)initWithObjects:(const id [])objects forKeys:(const id<NSCopying> [])keys count:(NSUInteger)cnt
{
self = [self initCommon];
if (self) {
_dict = [NSMutableDictionary dictionary];
for (NSUInteger i = 0; i < cnt; ++i) {
_dict[keys[i]] = objects[i];
}
}
return self;
}
- (NSUInteger)count
{
__block NSUInteger count;
dispatch_sync(_queue, ^{
count = _dict.count;
});
return count;
}
- (id)objectForKey:(id)aKey
{
__block id obj;
dispatch_sync(_queue, ^{
obj = _dict[aKey];
});
return obj;
}
- (NSEnumerator *)keyEnumerator
{
__block NSEnumerator *enu;
dispatch_sync(_queue, ^{
enu = [_dict keyEnumerator];
});
return enu;
}
- (void)setObject:(id)anObject forKey:(id<NSCopying>)aKey
{
aKey = [aKey copyWithZone:NULL];
dispatch_barrier_async(_queue, ^{
_dict[aKey] = anObject;
});
}
- (void)removeObjectForKey:(id)aKey
{
dispatch_barrier_async(_queue, ^{
[_dict removeObjectForKey:aKey];
});
}
- (void)removeAllObjects{
dispatch_barrier_async(_queue, ^{
[_dict removeAllObjects];
});
}
- (id)copy{
__block id copyInstance;
dispatch_sync(_queue, ^{
copyInstance = [_dict copy];
});
return copyInstance;
}
@end
