98 lines
4.3 KiB
Objective-C
98 lines
4.3 KiB
Objective-C
//
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// The MIT License (MIT)
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// Copyright (c) 2019 Oleg Geier
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#import "NSURLRequest+Ext.h"
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#import "NSString+Ext.h"
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#import "NSError+Ext.h"
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/// @return Shared URL session with caches disabled, enabled gzip encoding and custom user agent.
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static NSURLSession* NonCachingURLSession(void) {
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static NSURLSession *session = nil;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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NSURLSessionConfiguration *conf = [NSURLSessionConfiguration defaultSessionConfiguration];
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conf.HTTPCookieAcceptPolicy = NSHTTPCookieAcceptPolicyNever;
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conf.HTTPShouldSetCookies = NO;
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conf.HTTPCookieStorage = nil; // disables '~/Library/Cookies/'
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conf.requestCachePolicy = NSURLRequestReloadIgnoringLocalCacheData;
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conf.URLCache = nil; // disables '~/Library/Caches/de.relikd.baRSS/'
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conf.HTTPAdditionalHeaders = @{ @"User-Agent": @"baRSS (macOS)",
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@"Accept-Encoding": @"gzip" };
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session = [NSURLSession sessionWithConfiguration:conf];
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});
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return session;
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}
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@implementation NSURLRequest (Ext)
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/// @return New request from URL. Ensures that at least @c http scheme is set.
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+ (instancetype)withURL:(NSString*)urlStr {
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NSURL *url = [NSURL URLWithString:urlStr];
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if (!url.scheme)
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url = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@", urlStr]]; // will redirect to https
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return [self requestWithURL:url];
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}
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/// Perform request with non caching @c NSURLSession . If HTTP status code is @c 304 then @c data @c = @c nil.
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- (NSURLSessionDataTask*)dataTask:(nonnull void(^)(NSData * _Nullable data, NSError * _Nullable error, NSHTTPURLResponse *response))block {
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NSURLSessionDataTask *task = [NonCachingURLSession() dataTaskWithRequest:self completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
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NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
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NSInteger status = [httpResponse statusCode];
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#if DEBUG && ENV_LOG_DOWNLOAD
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/*if (status != 304)*/ printf("GET %ld %s\n", status, self.URL.absoluteString.UTF8String);
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#endif
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if (error || status == 304) {
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data = nil; // if status == 304, data & error nil
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} else if (status >= 400 && status < 600) { // catch Client & Server errors
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error = [NSError statusCode:status reason:(status >= 500 ? [NSString plainTextFromHTMLData:data] : nil)];
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data = nil;
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}
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block(data, error, httpResponse);
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}];
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[task resume];
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return task;
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}
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/// Prepare a download task and immediatelly perform request with non caching URL session.
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- (NSURLSessionDownloadTask*)downloadTask:(void(^)(NSURL * _Nullable path, NSError * _Nullable error))block {
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NSURLSessionDownloadTask *task = [NonCachingURLSession() downloadTaskWithRequest:self completionHandler:^(NSURL * _Nullable location, NSURLResponse * _Nullable response, NSError * _Nullable error) {
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block(location, error);
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}];
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[task resume];
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return task;
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}
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/*
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Developer Tip, error log:
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Task <..> HTTP load failed (error code: -1003 [12:8])
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Task <..> finished with error - code: -1003 --- NSURLErrorCannotFindHost
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==> NSURLErrorCannotFindHost in #import <Foundation/NSURLError.h>
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TIC TCP Conn Failed [21:0x1d417fb00]: 1:65 Err(65) --- EHOSTUNREACH, No route to host
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TIC Read Status [9:0x0]: 1:57 --- ENOTCONN, Socket is not connected
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==> EHOSTUNREACH in #import <sys/errno.h>
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*/
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@end
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