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//
// STHTTPNetTaskQueueHandler.m
// STNetTaskQueue
//
// Created by Kevin Lin on 29/11/14.
// Copyright (c) 2014 Sth4Me. All rights reserved.
//
#import "STHTTPNetTaskQueueHandler.h"
#import "STHTTPNetTask.h"
#import "STHTTPNetTaskParametersPacker.h"
#import "STNetTaskQueueLog.h"
#import <objc/runtime.h>
@interface STHTTPNetTask (STInternal)
@property (atomic, assign) NSInteger statusCode;
@property (atomic, strong) NSDictionary *responseHeaders;
@end
@class STHTTPNetTaskQueueHandlerOperation;
@interface NSURLSessionTask (STHTTPNetTaskQueueHandlerOperation)
@property (nonatomic, strong) STHTTPNetTaskQueueHandlerOperation *operation;
@end
@implementation NSURLSessionTask (STHTTPNetTaskQueueHandlerOperation)
@dynamic operation;
- (void)setOperation:(STHTTPNetTaskQueueHandlerOperation *)operation
{
objc_setAssociatedObject(self, @selector(operation), operation, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (STHTTPNetTaskQueueHandlerOperation *)operation
{
return objc_getAssociatedObject(self, @selector(operation));
}
@end
static NSDictionary *STHTTPNetTaskMethodMap;
static NSDictionary *STHTTPNetTaskContentTypeMap;
static NSString *STHTTPNetTaskFormDataBoundary;
static NSMapTable *STHTTPNetTaskToSessionTask;
@interface STHTTPNetTaskQueueHandlerOperation : NSObject <NSURLSessionDataDelegate>
@property (nonatomic, strong) STNetTaskQueue *queue;
@property (nonatomic, strong) STHTTPNetTask *task;
@property (nonatomic, strong) NSURLSession *session;
@property (nonatomic, strong) NSURL *baseURL;
- (void)start;
@end
@implementation STHTTPNetTaskQueueHandlerOperation
{
NSMutableData *_data;
}
+ (void)load
{
STHTTPNetTaskMethodMap = @{ @(STHTTPNetTaskGet): @"GET",
@(STHTTPNetTaskDelete): @"DELETE",
@(STHTTPNetTaskHead): @"HEAD",
@(STHTTPNetTaskPatch): @"PATCH",
@(STHTTPNetTaskPost): @"POST",
@(STHTTPNetTaskPut): @"PUT" };
STHTTPNetTaskContentTypeMap = @{ @(STHTTPNetTaskRequestJSON): @"application/json; charset=utf-8",
@(STHTTPNetTaskRequestKeyValueString): @"application/x-www-form-urlencoded",
@(STHTTPNetTaskRequestFormData): @"multipart/form-data" };
STHTTPNetTaskFormDataBoundary = [NSString stringWithFormat:@"ST-Boundary-%@", [[NSUUID UUID] UUIDString]];
STHTTPNetTaskToSessionTask = [[NSMapTable alloc] initWithKeyOptions:NSPointerFunctionsWeakMemory valueOptions:NSPointerFunctionsWeakMemory capacity:50];
}
- (void)start
{
_data = [NSMutableData new];
NSDictionary *headers = self.task.headers;
NSDictionary *parameters = [[[STHTTPNetTaskParametersPacker alloc] initWithNetTask:_task] pack];
NSURLSessionTask *sessionTask = nil;
NSMutableURLRequest *request = [NSMutableURLRequest new];
request.HTTPMethod = STHTTPNetTaskMethodMap[@(_task.method)];
if (_baseURL.user.length || _baseURL.password.length) {
NSString *credentials = [NSString stringWithFormat:@"%@:%@", _baseURL.user, _baseURL.password];
credentials = [[credentials dataUsingEncoding:NSUTF8StringEncoding] base64EncodedStringWithOptions:kNilOptions];
[request setValue:[NSString stringWithFormat:@"Basic %@", credentials] forHTTPHeaderField:@"Authorization"];
}
switch (_task.method) {
case STHTTPNetTaskGet:
case STHTTPNetTaskHead:
case STHTTPNetTaskDelete: {
NSURLComponents *urlComponents = [NSURLComponents componentsWithURL:[self requestURL]
resolvingAgainstBaseURL:NO];
if (parameters.count) {
urlComponents.query = [self queryStringFromParameters:parameters];
}
request.URL = urlComponents.URL;
}
break;
case STHTTPNetTaskPost:
case STHTTPNetTaskPut:
case STHTTPNetTaskPatch: {
request.URL = [self requestURL];
NSDictionary *datas = _task.datas;
if (_task.requestType != STHTTPNetTaskRequestFormData) {
request.HTTPBody = [self bodyDataFromParameters:parameters requestType:_task.requestType];
[request setValue:STHTTPNetTaskContentTypeMap[@(_task.requestType)] forHTTPHeaderField:@"Content-Type"];
}
else {
request.HTTPBody = [self formDataFromParameters:parameters datas:datas];
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", STHTTPNetTaskFormDataBoundary];
[request setValue:contentType forHTTPHeaderField: @"Content-Type"];
}
}
break;
default: {
NSAssert(NO, @"Invalid STHTTPNetTaskMethod");
}
break;
}
for (NSString *headerField in headers) {
[request setValue:headers[headerField] forHTTPHeaderField:headerField];
}
sessionTask = [_session dataTaskWithRequest:request];
[STHTTPNetTaskToSessionTask setObject:sessionTask forKey:_task];
sessionTask.operation = self;
[sessionTask resume];
}
- (NSURL *)requestURL
{
if (_baseURL) {
return [_baseURL URLByAppendingPathComponent:_task.uri];
}
return [NSURL URLWithString:_task.uri];
}
#pragma mark - NSURLSessionDataDelegate
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
[_data appendData:data];
}
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
if (error && error.code == NSURLErrorCancelled) {
return;
}
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)task.response;
NSData *data = [NSData dataWithData:_data];
_task.statusCode = httpResponse.statusCode;
_task.responseHeaders = httpResponse.allHeaderFields;
if (httpResponse.statusCode >= 200 && httpResponse.statusCode < 300) {
id responseObj = nil;
NSError *error = nil;
switch (_task.responseType) {
case STHTTPNetTaskResponseRawData:
responseObj = data;
break;
case STHTTPNetTaskResponseString:
responseObj = [self stringFromData:data];
break;
case STHTTPNetTaskResponseJSON:
default:
responseObj = [self JSONFromData:data];
break;
}
if (!responseObj) {
error = [NSError errorWithDomain:STHTTPNetTaskResponseParsedError
code:0
userInfo:@{ @"url": httpResponse.URL.absoluteString }];
}
if (error) {
[_queue task:_task didFailWithError:error];
}
else {
[_queue task:_task didResponse:responseObj];
}
}
else {
if (!error) { // Response status code is not 20x
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
error = [NSError errorWithDomain:STHTTPNetTaskServerError
code:0
userInfo:@{ STHTTPNetTaskErrorStatusCodeUserInfoKey: @(httpResponse.statusCode),
STHTTPNetTaskErrorResponseDataUserInfoKey: data }];
#pragma GCC diagnostic pop
[STNetTaskQueueLog log:@"\n%@", _task.description];
}
[_queue task:_task didFailWithError:error];
}
}
#pragma mark - Response data parsing methods
- (NSString *)stringFromData:(NSData *)data
{
@try {
NSString *string = data.length ? [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] : @"";
return string;
}
@catch (NSException *exception) {
[STNetTaskQueueLog log:@"String parsed error: %@", exception.debugDescription];
return nil;
}
}
- (id)JSONFromData:(NSData *)data
{
NSError *error;
id JSON = data.length ? [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error] : @{};
if (error) {
[STNetTaskQueueLog log:@"JSON parsed error: %@", error.debugDescription];
return nil;
}
return JSON;
}
#pragma mark - Request data constructing methods
- (NSString *)queryStringFromParameters:(NSDictionary *)parameters
{
if (!parameters.count) {
return @"";
}
NSMutableString *queryString = [NSMutableString string];
[parameters enumerateKeysAndObjectsUsingBlock:^(NSString *key, id value, BOOL *stop) {
if ([value isKindOfClass:[NSArray class]]) {
for (id element in value) {
[self appendKeyValueToString:queryString withKey:key value:[element description] percentEncoding:NO];
}
}
else {
[self appendKeyValueToString:queryString withKey:key value:[value description] percentEncoding:NO];
}
}];
[queryString deleteCharactersInRange:NSMakeRange(queryString.length - 1, 1)];
return queryString;
}
- (NSData *)bodyDataFromParameters:(NSDictionary *)parameters requestType:(STHTTPNetTaskRequestType)requestType
{
if (!parameters.count) {
return nil;
}
NSData *bodyData = nil;
switch (requestType) {
case STHTTPNetTaskRequestJSON: {
NSError *error = nil;
bodyData = [NSJSONSerialization dataWithJSONObject:parameters options:kNilOptions error:&error];
NSAssert(!error, @"Request is not in JSON format");
}
break;
case STHTTPNetTaskRequestKeyValueString:
default: {
NSMutableString *bodyString = [NSMutableString string];
[parameters enumerateKeysAndObjectsUsingBlock:^(NSString *key, id value, BOOL *stop) {
if ([value isKindOfClass:[NSArray class]]) {
for (id element in value) {
[self appendKeyValueToString:bodyString withKey:key value:[element description] percentEncoding:YES];
}
}
else {
[self appendKeyValueToString:bodyString withKey:key value:[value description] percentEncoding:YES];
}
}];
[bodyString deleteCharactersInRange:NSMakeRange(bodyString.length - 1, 1)];
bodyData = [bodyString dataUsingEncoding:NSUTF8StringEncoding];
}
break;
}
return bodyData;
}
- (NSData *)formDataFromParameters:(NSDictionary *)parameters datas:(NSDictionary *)datas
{
NSMutableData *formData = [NSMutableData data];
[parameters enumerateKeysAndObjectsUsingBlock:^(NSString *key, id value, BOOL *stop) {
if ([value isKindOfClass:[NSArray class]]) {
for (id element in value) {
[self appendToFormData:formData withKey:key value:[element description]];
}
}
else {
[self appendToFormData:formData withKey:key value:[value description]];
}
}];
[datas enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSData *fileData, BOOL *stop) {
[formData appendData:[[NSString stringWithFormat:@"--%@\r\n", STHTTPNetTaskFormDataBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[formData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", key, key] dataUsingEncoding:NSUTF8StringEncoding]];
[formData appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n\r\n", @"*/*"] dataUsingEncoding:NSUTF8StringEncoding]];
[formData appendData:fileData];
[formData appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
}];
[formData appendData:[[NSString stringWithFormat:@"--%@--\r\n", STHTTPNetTaskFormDataBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
return formData;
}
- (void)appendKeyValueToString:(NSMutableString *)string withKey:(NSString *)key value:(NSString *)value percentEncoding:(BOOL)percentEncoding
{
if (percentEncoding) {
key = [key stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
value = [value stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
}
[string appendFormat:@"%@=%@&", key, value];
}
- (void)appendToFormData:(NSMutableData *)formData withKey:(NSString *)key value:(NSString *)value
{
[formData appendData:[[NSString stringWithFormat:@"--%@\r\n", STHTTPNetTaskFormDataBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
[formData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", key] dataUsingEncoding:NSUTF8StringEncoding]];
[formData appendData:[[NSString stringWithFormat:@"%@\r\n", value] dataUsingEncoding:NSUTF8StringEncoding]];
}
@end
@interface STHTTPNetTaskQueueHandler () <NSURLSessionDataDelegate>
@end
@implementation STHTTPNetTaskQueueHandler
{
NSURL *_baseURL;
NSURLSession *_urlSession;
}
- (instancetype)initWithBaseURL:(NSURL *)baseURL
{
return [self initWithBaseURL:baseURL configuration:[NSURLSessionConfiguration defaultSessionConfiguration]];
}
- (instancetype)initWithBaseURL:(NSURL *)baseURL configuration:(NSURLSessionConfiguration *)configuration
{
if (self = [super init]) {
_baseURL = baseURL;
_urlSession = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
}
return self;
}
#pragma mark - STNetTaskQueueHandler
- (void)netTaskQueue:(STNetTaskQueue *)netTaskQueue handleTask:(STNetTask *)task
{
NSAssert([task isKindOfClass:[STHTTPNetTask class]], @"Net task should be subclass of STHTTPNetTask");
STHTTPNetTaskQueueHandlerOperation *operation = [STHTTPNetTaskQueueHandlerOperation new];
operation.queue = netTaskQueue;
operation.task = (STHTTPNetTask *)task;
operation.baseURL = _baseURL;
operation.session = _urlSession;
[operation start];
}
- (void)netTaskQueue:(STNetTaskQueue *)netTaskQueue didCancelTask:(STNetTask *)task
{
NSAssert([task isKindOfClass:[STHTTPNetTask class]], @"Net task should be subclass of STHTTPNetTask");
NSURLSessionTask *sessionTask = [STHTTPNetTaskToSessionTask objectForKey:task];
[sessionTask cancel];
}
- (void)netTaskQueueDidBecomeInactive:(STNetTaskQueue *)netTaskQueue
{
[_urlSession invalidateAndCancel];
}
#pragma mark - NSURLSessionDataDelegate
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
[dataTask.operation URLSession:session dataTask:dataTask didReceiveData:data];
}
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
[task.operation URLSession:session task:task didCompleteWithError:error];
}
@end