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+/*
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+ Copyright (c) 2012-2014, Pierre-Olivier Latour
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+ All rights reserved.
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+
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+ Redistribution and use in source and binary forms, with or without
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+ modification, are permitted provided that the following conditions are met:
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+ * Redistributions of source code must retain the above copyright
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+ notice, this list of conditions and the following disclaimer.
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+ * Redistributions in binary form must reproduce the above copyright
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+ notice, this list of conditions and the following disclaimer in the
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+ documentation and/or other materials provided with the distribution.
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+ * The name of Pierre-Olivier Latour may not be used to endorse
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+ or promote products derived from this software without specific
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+ prior written permission.
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+
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+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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+ DISCLAIMED. IN NO EVENT SHALL PIERRE-OLIVIER LATOUR BE LIABLE FOR ANY
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+ DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ */
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+
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+#import <TargetConditionals.h>
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+#if TARGET_OS_IPHONE
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+#import <MobileCoreServices/MobileCoreServices.h>
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+#else
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+#import <SystemConfiguration/SystemConfiguration.h>
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+#endif
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+
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+#import <ifaddrs.h>
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+#import <net/if.h>
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+#import <netdb.h>
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+
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+#import "GCDWebServerPrivate.h"
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+
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+static NSDateFormatter* _dateFormatterRFC822 = nil;
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+static NSDateFormatter* _dateFormatterISO8601 = nil;
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+static dispatch_queue_t _dateFormatterQueue = NULL;
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+
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+// HTTP/1.1 server must use RFC822
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+// TODO: Handle RFC 850 and ANSI C's asctime() format (http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3)
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+void GCDWebServerInitializeFunctions() {
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+ DCHECK([NSThread isMainThread]); // NSDateFormatter should be initialized on main thread
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+ if (_dateFormatterRFC822 == nil) {
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+ _dateFormatterRFC822 = [[NSDateFormatter alloc] init];
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+ _dateFormatterRFC822.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
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+ _dateFormatterRFC822.dateFormat = @"EEE',' dd MMM yyyy HH':'mm':'ss 'GMT'";
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+ _dateFormatterRFC822.locale = ARC_AUTORELEASE([[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]);
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+ DCHECK(_dateFormatterRFC822);
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+ }
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+ if (_dateFormatterISO8601 == nil) {
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+ _dateFormatterISO8601 = [[NSDateFormatter alloc] init];
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+ _dateFormatterISO8601.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
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+ _dateFormatterISO8601.dateFormat = @"yyyy-MM-dd'T'HH:mm:ss'+00:00'";
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+ _dateFormatterISO8601.locale = ARC_AUTORELEASE([[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]);
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+ DCHECK(_dateFormatterISO8601);
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+ }
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+ if (_dateFormatterQueue == NULL) {
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+ _dateFormatterQueue = dispatch_queue_create(NULL, DISPATCH_QUEUE_SERIAL);
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+ DCHECK(_dateFormatterQueue);
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+ }
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+}
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+
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+NSString* GCDWebServerNormalizeHeaderValue(NSString* value) {
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+ if (value) {
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+ NSRange range = [value rangeOfString:@";"]; // Assume part before ";" separator is case-insensitive
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+ if (range.location != NSNotFound) {
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+ value = [[[value substringToIndex:range.location] lowercaseString] stringByAppendingString:[value substringFromIndex:range.location]];
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+ } else {
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+ value = [value lowercaseString];
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+ }
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+ }
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+ return value;
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+}
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+
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+NSString* GCDWebServerTruncateHeaderValue(NSString* value) {
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+ DCHECK([value isEqualToString:GCDWebServerNormalizeHeaderValue(value)]);
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+ NSRange range = [value rangeOfString:@";"];
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+ return range.location != NSNotFound ? [value substringToIndex:range.location] : value;
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+}
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+
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+NSString* GCDWebServerExtractHeaderValueParameter(NSString* value, NSString* name) {
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+ DCHECK([value isEqualToString:GCDWebServerNormalizeHeaderValue(value)]);
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+ NSString* parameter = nil;
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+ NSScanner* scanner = [[NSScanner alloc] initWithString:value];
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+ [scanner setCaseSensitive:NO]; // Assume parameter names are case-insensitive
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+ NSString* string = [NSString stringWithFormat:@"%@=", name];
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+ if ([scanner scanUpToString:string intoString:NULL]) {
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+ [scanner scanString:string intoString:NULL];
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+ if ([scanner scanString:@"\"" intoString:NULL]) {
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+ [scanner scanUpToString:@"\"" intoString:¶meter];
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+ } else {
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+ [scanner scanUpToCharactersFromSet:[NSCharacterSet whitespaceCharacterSet] intoString:¶meter];
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+ }
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+ }
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+ ARC_RELEASE(scanner);
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+ return parameter;
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+}
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+
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+// http://www.w3schools.com/tags/ref_charactersets.asp
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+NSStringEncoding GCDWebServerStringEncodingFromCharset(NSString* charset) {
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+ NSStringEncoding encoding = kCFStringEncodingInvalidId;
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+ if (charset) {
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+ encoding = CFStringConvertEncodingToNSStringEncoding(CFStringConvertIANACharSetNameToEncoding((CFStringRef)charset));
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+ }
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+ return (encoding != kCFStringEncodingInvalidId ? encoding : NSUTF8StringEncoding);
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+}
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+
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+NSString* GCDWebServerFormatRFC822(NSDate* date) {
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+ __block NSString* string;
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+ dispatch_sync(_dateFormatterQueue, ^{
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+ string = [_dateFormatterRFC822 stringFromDate:date];
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+ });
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+ return string;
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+}
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+
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+NSDate* GCDWebServerParseRFC822(NSString* string) {
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+ __block NSDate* date;
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+ dispatch_sync(_dateFormatterQueue, ^{
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+ date = [_dateFormatterRFC822 dateFromString:string];
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+ });
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+ return date;
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+}
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+
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+NSString* GCDWebServerFormatISO8601(NSDate* date) {
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+ __block NSString* string;
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+ dispatch_sync(_dateFormatterQueue, ^{
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+ string = [_dateFormatterISO8601 stringFromDate:date];
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+ });
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+ return string;
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+}
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+
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+NSDate* GCDWebServerParseISO8601(NSString* string) {
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+ __block NSDate* date;
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+ dispatch_sync(_dateFormatterQueue, ^{
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+ date = [_dateFormatterISO8601 dateFromString:string];
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+ });
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+ return date;
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+}
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+
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+BOOL GCDWebServerIsTextContentType(NSString* type) {
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+ return ([type hasPrefix:@"text/"] || [type hasPrefix:@"application/json"] || [type hasPrefix:@"application/xml"]);
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+}
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+
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+NSString* GCDWebServerDescribeData(NSData* data, NSString* type) {
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+ if (GCDWebServerIsTextContentType(type)) {
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+ NSString* charset = GCDWebServerExtractHeaderValueParameter(type, @"charset");
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+ NSString* string = [[NSString alloc] initWithData:data encoding:GCDWebServerStringEncodingFromCharset(charset)];
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+ if (string) {
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+ return ARC_AUTORELEASE(string);
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+ }
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+ }
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+ return [NSString stringWithFormat:@"<%lu bytes>", (unsigned long)data.length];
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+}
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+
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+NSString* GCDWebServerGetMimeTypeForExtension(NSString* extension) {
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+ static NSDictionary* _overrides = nil;
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+ if (_overrides == nil) {
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+ _overrides = [[NSDictionary alloc] initWithObjectsAndKeys:
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+ @"text/css", @"css",
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+ nil];
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+ }
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+ NSString* mimeType = nil;
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+ extension = [extension lowercaseString];
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+ if (extension.length) {
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+ mimeType = [_overrides objectForKey:extension];
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+ if (mimeType == nil) {
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+ CFStringRef uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, (ARC_BRIDGE CFStringRef)extension, NULL);
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+ if (uti) {
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+ mimeType = ARC_BRIDGE_RELEASE(UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType));
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+ CFRelease(uti);
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+ }
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+ }
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+ }
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+ return mimeType ? mimeType : kGCDWebServerDefaultMimeType;
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+}
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+
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+NSString* GCDWebServerEscapeURLString(NSString* string) {
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+ return ARC_BRIDGE_RELEASE(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)string, NULL, CFSTR(":@/?&=+"), kCFStringEncodingUTF8));
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+}
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+
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+NSString* GCDWebServerUnescapeURLString(NSString* string) {
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+ return ARC_BRIDGE_RELEASE(CFURLCreateStringByReplacingPercentEscapesUsingEncoding(kCFAllocatorDefault, (CFStringRef)string, CFSTR(""), kCFStringEncodingUTF8));
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+}
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+
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+// http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.1
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+NSDictionary* GCDWebServerParseURLEncodedForm(NSString* form) {
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+ NSMutableDictionary* parameters = [NSMutableDictionary dictionary];
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+ NSScanner* scanner = [[NSScanner alloc] initWithString:form];
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+ [scanner setCharactersToBeSkipped:nil];
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+ while (1) {
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+ NSString* key = nil;
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+ if (![scanner scanUpToString:@"=" intoString:&key] || [scanner isAtEnd]) {
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+ break;
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+ }
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+ [scanner setScanLocation:([scanner scanLocation] + 1)];
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+
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+ NSString* value = nil;
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+ if (![scanner scanUpToString:@"&" intoString:&value]) {
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+ break;
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+ }
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+
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+ key = [key stringByReplacingOccurrencesOfString:@"+" withString:@" "];
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+ value = [value stringByReplacingOccurrencesOfString:@"+" withString:@" "];
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+ if (key && value) {
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+ [parameters setObject:GCDWebServerUnescapeURLString(value) forKey:GCDWebServerUnescapeURLString(key)];
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+ } else {
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+ DNOT_REACHED();
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+ }
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+
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+ if ([scanner isAtEnd]) {
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+ break;
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+ }
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+ [scanner setScanLocation:([scanner scanLocation] + 1)];
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+ }
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+ ARC_RELEASE(scanner);
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+ return parameters;
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+}
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+
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+NSString* GCDWebServerGetPrimaryIPv4Address() {
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+ NSString* address = nil;
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+#if TARGET_OS_IPHONE
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+#if !TARGET_IPHONE_SIMULATOR
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+ const char* primaryInterface = "en0"; // WiFi interface on iOS
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+#endif
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+#else
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+ const char* primaryInterface = NULL;
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+ SCDynamicStoreRef store = SCDynamicStoreCreate(kCFAllocatorDefault, CFSTR("GCDWebServer"), NULL, NULL);
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+ if (store) {
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+ CFPropertyListRef info = SCDynamicStoreCopyValue(store, CFSTR("State:/Network/Global/IPv4"));
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+ if (info) {
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+ primaryInterface = [[NSString stringWithString:[(ARC_BRIDGE NSDictionary*)info objectForKey:@"PrimaryInterface"]] UTF8String];
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+ CFRelease(info);
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+ }
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+ CFRelease(store);
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+ }
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+ if (primaryInterface == NULL) {
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+ primaryInterface = "lo0";
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+ }
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+#endif
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+ struct ifaddrs* list;
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+ if (getifaddrs(&list) >= 0) {
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+ for (struct ifaddrs* ifap = list; ifap; ifap = ifap->ifa_next) {
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+#if TARGET_IPHONE_SIMULATOR
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+ if (strcmp(ifap->ifa_name, "en0") && strcmp(ifap->ifa_name, "en1")) // Assume en0 is Ethernet and en1 is WiFi since there is no way to use SystemConfiguration framework in iOS Simulator
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+#else
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+ if (strcmp(ifap->ifa_name, primaryInterface))
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+#endif
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+ {
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+ continue;
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+ }
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+ if ((ifap->ifa_flags & IFF_UP) && (ifap->ifa_addr->sa_family == AF_INET)) {
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+ char buffer[NI_MAXHOST];
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+ if (getnameinfo(ifap->ifa_addr, ifap->ifa_addr->sa_len, buffer, sizeof(buffer), NULL, 0, NI_NUMERICHOST | NI_NOFQDN) >= 0) {
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+ address = [NSString stringWithUTF8String:buffer];
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+ }
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+ break;
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+ }
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+ }
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+ freeifaddrs(list);
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+ }
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+ return address;
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+}
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Pierre-Olivier Latour