decoding

I have to encode an array of bytes to a base64 string (and decode this string) on an old Delphi 2007. How could I do? Further Informations: I've tried synapse (As suggested here Binary to Base64 (Delphi) ). Indy ships with Delphi, and has TIdEncoderMIME and TIdDecoderMIME classes for handling base64. For example: uses ..., IdCoder, IdCoderMIME; var Bytes: TIdBytes; Base64String: String; begin //... Bytes := ...; // array of bytes //... Base64String := TIdEncoderMIME.EncodeBytes(Bytes); //... Bytes := TIdDecoderMIME.DecodeBytes(Base64String); //... end; There are also methods for encoding

I'm trying to convert ascii characters to utf-8. This little example below still returns ascii characters: chunk = chunk.decode('ISO-8859-1').encode('UTF-8') print chardet.detect(chunk[0:2000]) It returns: {'confidence': 1.0, 'encoding': 'ascii'} How come? Quoting from Python's documentation : UTF-8 has several convenient properties: It can handle any Unicode code point. A Unicode string is turned into a string of bytes containing no embedded zero bytes. This avoids byte-ordering issues, and means UTF-8 strings can be processed by C functions such as strcpy() and sent through protocols that

I am trying to decode a websocket frame, but I'm not successful when it comes to decoding the extended payload. Here what I did achieve so far: char *in = data; char *buffer; unsigned int i; unsigned char mask[4]; unsigned int packet_length = 0; int rc; /* Expect a finished text frame. */ assert(in[0] == '\x81'); packet_length = ((unsigned char) in[1]) & 0x7f; mask[0] = in[2]; mask[1] = in[3]; mask[2] = in[4]; mask[3] = in[5]; if (packet_length <= 125) { **// This decoding works** /* Unmask the payload. */ for (i = 0; i < packet_length; i++) in[6 + i] ^= mask[i % 4]; rc = asprintf(&buffer, "%.

I am having some interesting results trying to discern the differences between using Encode::decode("utf8", $var) and utf8::decode($var) . I've already discovered that calling the former multiple times on a variable will eventually result in an error "Cannot decode string with wide characters at..." whereas the latter method will happily run as many times as you want, simply returning false. What I'm having trouble understanding is how the length function returns different results depending on which method you use to decode. The problem arises because I am dealing with "doubly encoded" utf8

I want get the image from an xml file which is encoded using base64. I want to decode that data into image, but i don't know how to do that. So please give me some instructions to find that... Jhaliya There's a nice code sample at the bottom of this post. Very self-contained... http://www.cocoadev.com/index.pl?BaseSixtyFour for more read SO post 来源： https://stackoverflow.com/questions/5429680/how-to-use-base64-classes

Our web server needs to process many compositions of large images together before sending the results to web clients. This process is performance critical because the server can receive several thousands of requests per hour. Right now our solution loads PNG files (around 1MB each) from the HD and sends them to the video card so the composition is done on the GPU. We first tried loading our images using the PNG decoder exposed by the XNA API. We saw the performance was not too good. To understand if the problem was loading from the HD or the decoding of the PNG, we modified that by loading the