I'm geting an array of bytes (it's a txt file) from a server that I need to save at my app's documents folder. I,ve tried many solutions I found and I managed to save the file, but the encoding appears to be wrong, when I try to view the contents of the txt file saved the first line says:
<.base64Binary xmlns="http://schemas.microsoft.com/2003/10/Serialization/">
...then about 50 lines of random characters until the document ends with:
<./base64Binary>
I've tried decoding the NSData to nsstring using some examples i've found, but none could solve this problem
thanks
I've tried this solutions:
http://www.cocoadev.com/index.pl?BaseSixtyFour
http://cocoawithlove.com/2009/06/base64-encoding-options-on-mac-and.html
Finally solved it!! Using part of the code in
http://cocoawithlove.com/2009/06/base64-encoding-options-on-mac-and.html
into my classes and parsing the xml before encoding.
Related
I have a string that looks like this
H4sIALYnhUsCA9VXW5aDIAz9zypcgiU8dDnTWtfQ5Q8kEgSR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My initial guess was that this was a Base64encoded file of some sort. Any ideas on how I can figure out if/which type of file it is? It should contain MIME info I guess but how would I save it to a file without fragmenting it.
It's base64. When you decode it, you get a gzipped file, which consists of a boatload of hex characters (literally, as ASCII 0xNN hex characters). They're mostly in the A-Z,a-z range.
I'd paste it here, but from this, I suspect this is part of some exercise you're doing, so I think I'll leave it to you to figure out.
P.S. For edification, I determined the binary output was a gzipped file by using the unix file command, to identify the "magic" bytes, which showed that it was gzipped. Use your decode_base64 function or whatever it is, then dump the return value into a file and gunzip it.
I am making a directory for an app and I need to parse the the names, e-mail, phone #, and office for each item that I want to display in a UITableView. I have a class made but I have never really dealt with pasring anything past simple txt files.
I need to load a URL to a xml file, which consists of the following type of data at the bottom. It does not have xml tags, but it is saved as a .xml
I have read up on the NSXMLParsers, but I wasn't sure if that would be the correct way to do this or if there was an easier way.
Example of part of the .xml file below, this is just part of a few hundred lines that are organized in the same manner, by division, department, then person.
Thanks for any help!
http://cs.millersville.edu/School of Science and MathematicsDr.FirstH.LastRoddy Science CenterFirst.Last#millersville.edu872-3838Computer ScienceMrs.First.LastRoddy Science CenterFirst.Last#millersville.edu872-3858Computer ScienceDr.FirstH.LastRoddy Science CenterFirstH.LastRoddy#millersville.edu872-3470Computer ScienceDr.FirstH.LastRoddy Science CenterFirst.Last#millersville.edu872-3724Computer ScienceMs.FirstA.GilbertLast Science CenterFirst.Last#millersville.edu871-2214Computer ScienceDr.FirstH.LastRoddy Science CenterFirst.Last#millersville.edu872-3666
There's no way you can use a xml parser for this file.
Instead you may try to use NSScanner to parse the text file. A couple of tutorials are listed here:
Parsing CSV Data
Writing a parser using NSScanner
without the xml tags, your file is as good as a plain text file...
rows separated by new line character....
and each line contains data separated by a dot (.) or something like that. figure out the pattern and parse it like you would parse a text file...
I have written a small program which can encode/decode a text with uuencode/uudecode. The code is based on the algorithm described on Wikipedia. It works fine when I encode/decode a string. But I have found a uuencoded file which I can't decode. This website can decode the file, but when I encode it again I don't get the same file. In addition, when I decode only one line of the file I don't get readable text (neither with my program nor with the decoder I linked before). But in uuenoding all lines are independent from each other - this must be able.
Do someone know whether there are some special variations of the uuenoding, which are not described on Wikipedia? I can decode some strings so my decoder can't be totally wrong. Perhaps someone has written his own decoder, so I post the whole file:
begin 666 Restricted.zip
M4$L#!!0````(`%T[="_]<LYX`P(``'0#```.````4F5S=')I8W1E9"YT>'1M
M4\MNVT`0NQOP/TSNM#PT0!/X4N16`RE0%.GC.I9&TE;2CKH/J_K[<E;IX]"+
M'UJ20W)6^]U3)SX=]KO][D*]SD(7XHD2CX/S'26EU`L%U_6)9#E1?46NQ4,7
MR?E6P\3)J:=%#ABZY7'$P2MO"0J1GGT3Z;B1YJ#?I4ZT:!X;N#KI34)%3Y%6
MS8#>A#I-&[;E`-H%'(EY#G[/(-I',=GI;XN"H49?''YXT#LE]BNU.<!&,*(W
M0&4Y7V#,F_&11NV<-TNU-!D!>HZP5"MF91^YE0-D&H2C5CAL\T&P:#/'A*<+
M#F6(!IEXW?Q?13Q=#P[XLBHJ>L[UX,;U8+`"X3I)0S^RJX=Q+3-28)##+IK:
MEAD#AQRM7DY)ICG%BK[:(,\=L$C>20*EUCR/8BP'&'H+.OT5:+`V>,*NK$%9
MZ<;>Q1X"1WJOBZ#_8HQ+`3?K%(U<1U-:7.HI6A]_+/V[\RU,J]DW!SMV#<37
M89W+>5QCL6/"MDHTQPV&UT5-<R!=?%D)MG^AR&Y3^>]::JP0H2MZ4>3UR?F,
M[>18,L'"..I2K'.,BP8TF<K)YT_/IG1S#<#VZ^,KX$QO'[\\WC_<W;V[?_-P
MW>^`/%.?TGP^G99EJ29MCC^K6JL\G%H78CJQC[CGU=S/V_M2KEN<A0?;A5U`
M[AC.U2*6OUOE0<KD#Q#\MM_]`E!+`0(4`!0````(`%T[="_]<LYX`P(``'0#
M```.``````````$`(`"V#0````!297-T<FEC=&5D+G1X=%!+!08``````0`!
+`#P````O`#``````
`
end
I found the solution! The problem was that I did not notice the first line. This line holds information about the data encoded - a file named Restricted.zip. So the decoded data is a ZIP file which I just had to unpack.
I got a text file named Restricted.txt which contains the readable data.
The problem was so easy, but it took me days to see its solution.
That's a good change over to packing algorithms - perhaps the next thing I do is writing my own program which can pack/unpack zip files.
Is there a way to remove a line from the end of a .txt file from Objective-C? I can't seem to find anything on manipulating text files from Objective-C, only reading them into a NSString.
Have you considered changing your data model to a plist? Plists are more easily read/written into/from NSDictionaries.
Otherwise, I think the only way is to read the file into a NSString, separate into a component NSArray by splitting on \n, remove the object at index n, write back into a string by joining with component \n, then writing back to the file.
I'm trying to write a small Python script to parse the .strings file in my iPhone application project and determine which keys might not be in use. I'm, also doing some string matching to filter out some of the results. This is where my problems start :). If I try something like
for file_line in strings_file:
if 'search_keyword' in file_line:
...
the search keyword will often not match, even though if I print every file line in the same for I seem to be reading the text correctly and my search keywords appear.
The problem is these .strings files are in some binary format. Does anyone know of a proper way to parse these files?
Use correct encoding to open the .strings-file and in your source code. According to documentation the encoding of your file could be utf-16.
# -*- coding: utf-8 -*-
import codecs
for line in codecs.open(u'your_file.strings', encoding='utf-16'):
if u'keyword' in line:
# process line
No experience with those .strings files, but here is the reason why you don't find matches:
strings_file.read()
returns a string with the full content of the file. Iterating over a string iterates over single characters, i.e. in your for loop, file_line isn't a line, it's always just one single character (a string of length 1), which obviously can't contain a multi-character search word.
It sounds like the stings file was saved as data. If python can't read it as is you can convert it to a plain text file in Objective-c.
Just: (1) read the strings file into a file with the proper encoding. (2) Convert to dictionary (3) write dictionary to another file.
So:
NSString *strings=[NSString stringWithContentsOfFile:filePath encoding:NSUTF16StringEncoding error:&error];
NSDictionary *dict=[strings propertyList];
[dict writeToFile:anotherFilePath atomically:NO];