![]() ![]() You will need to check the file header blocks that are all over the RAR. Info about the file format can be found on the Wikipedia page or in one of the references over there.ĭoing the same for RAR files will be harder because there is no single place to grab all the meta data from. After that you just have to interpret the central directory file headers to see if there is a PDF file inside the ZIP. Then you make sure if you have downloaded all that data in the first grab or if you need to grab some more again. This record has an offset of where the central directory will start, relative to the start of the archive. This should be the last 22 bytes starting with 0x06054b50 if there is no comment. You do this by grabbing enough of the last data and look for the End of central directory record (EOCD). You will need to make HTTP range requests to get pieces of the data you are requesting.įor ZIP files you will want to grab all the central directory records at the end of the file. ![]() ![]() Yes this is possible, but I think it will also depend on the server you are downloading from. ![]()
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