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//
// BCUtilCGI.m
// BioCocoa
//
// Created by John Timmer on Fri Jul 30 2004.
// Copyright (c) 2004 The BioCocoa Project. All rights reserved.
//
#import "BCUtilCGI.h"
#import "BCUtilStrings.h"
@implementation BCUtilCGI
+ (NSDictionary *) retrieveFormData {
// first, we find out if we received information from a "get" or a "post"
// get places its information in the "QUERY_STRING" environment variable.
NSDictionary *theEnvironment = [[NSProcessInfo processInfo] environment];
NSString *rawData = [theEnvironment objectForKey: @"QUERY_STRING"];
if ( rawData == nil || [rawData length] == 0 ) {
// if it's equal to nil, then we've received our data from a "post" form
// in this case, the data's been sent to stdin, and the environment variable
// "CONTENT_LENGTH" tells us how much data's there.
NSNumber *theLength = [theEnvironment objectForKey: @"CONTENT_LENGTH"];
if ( theLength == nil || [theLength intValue] == 0 )
return nil;
NSFileHandle *inputReader = [NSFileHandle fileHandleWithStandardInput];
NSData *tempData;
//////////////////////////////////////////////////////////////////////////////////
// WARNING - it may be possible for stdin's buffer to fill and the app stall
// in which case we'll try to read more than we can here
//////////////////////////////////////////////////////////////////////////////////
tempData = [inputReader readDataOfLength: [theLength intValue]];
[inputReader closeFile];
rawData= [[[NSString alloc] initWithData: tempData encoding: NSUTF8StringEncoding] autorelease];
}
if ( rawData == nil || [rawData length] == 0 )
return nil;
rawData = [rawData stringByAddingURLEscapesUsingEncoding: NSISOLatin1StringEncoding];
NSMutableDictionary *theReturn = [NSMutableDictionary dictionary];
NSArray *theEntries = [rawData componentsSeparatedByString: @"&"];
// check to see if the separator is a ; instead
// if there is only one form element, the second method will return the same thing
// as the first, so no harm done.
if ( [theEntries count] == 1 )
theEntries = [rawData componentsSeparatedByString: @";"];
NSEnumerator *entryEnumerator = [theEntries objectEnumerator];
NSString *anEntry, *tempKey, *tempValue;
NSRange equalLocation;
while ( anEntry = [entryEnumerator nextObject] ) {
equalLocation = [anEntry rangeOfString: @"="];
tempKey = [anEntry substringToIndex: equalLocation.location];
// see if the location is the last character in the string.
if ( equalLocation.location == [anEntry length] - 1 )
[theReturn setObject: @"" forKey: tempKey];
else {
tempKey = [anEntry substringToIndex: equalLocation.location];
tempValue = [anEntry substringFromIndex: equalLocation.location + 1];
[theReturn setObject: tempValue forKey: tempKey];
}
}
// we promised a non-mutable dictionary, so that's what we'll send
return [[theReturn copy] autorelease];
}
+ (void) errorOutWithMessage: (NSString *)theMessage {
// we simply stick the message between some necessary formatting for HTML output
NSString *someOutput = @"Content-type: text/html\n\n\n\n<html><body><p><b><font size=\"+1\">";
someOutput = [someOutput stringByAppendingString: theMessage];
someOutput = [someOutput stringByAppendingString : @"</font></b></p></body></html>"];
// create data from it and send it to stdout
NSFileHandle *outHandle = [NSFileHandle fileHandleWithStandardOutput];
NSData *writeBytes = [NSData dataWithBytes: [someOutput UTF8String] length: [someOutput length]];
[outHandle writeData: writeBytes];
[outHandle closeFile];
}
@end
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