However, to free you from such worries, many RAR file repair tools have been introduced into market. As RAR file is very sensitive to corruption, improper closure may have affected its header part leaving RAR file in incomplete state. If you are among them, you have faced similar issue then just relax!!! In this case, the RAR file header is header is damaged due to improper system termination. This is a kind of question asked again and again by lots of users across the World. Can anyone suggest something that helps me to resolve my problem?” It is priceless and I don’t have time to recollect entire information again. Data in that RAR file is important to me, since it has hundreds of journal pages, research papers, address book, etc. I was unable to access any of its contents after encountering this error message.
I didn’t bother much about it, but today when I tried to open RAR file I got an error message saying “WinRAR error the file header is corrupt”. Also, the number of fields of a file block can vary if some header flags are set: it is possible you took a wrong size.“Yesterday my system got abruptly shut down while extracting files from RAR archive. This is why I kept the decimal representations of crc32() and unpack() for the comparison. I noticed that when you convert it to hexadecimal, you can get false positives when comparing: '0f00' != 'f00'. I used this to grab the correct amount of data for the crc32 function. The size of the header can be found there. I started with reading the basic 7 byte header. I tested it on a couple of SRR files and it works as expected. set offset back to where we started from & $this->blockType != 0x72 // RAR marker block (fixed: magic number)Īrray_push($warnings, 'Invalid block header CRC found: header is corrupt.') & $this->headerCrc != 0x7171 // SRR RAR block & $this->headerCrc != 0圆a6a // SRR Stored File If ($crc != $this->headerCrc & $this->headerCrc != 0圆969 // SRR Header igonore blocks with no CRC set (same as twice the blockType)
$crcData = fread($this->fh, $this->hsize - 2) $this->addSize = 0 // size of data after the headerįseek($this->fh, $this->startOffset + 2, SEEK_SET)
$array = unpack('vheaderCrc/CblockType/vflags/vheaderSize', fread($this->fh, 7)) $this->startOffset = ftell($fileHandle) // current location in the file Here is it with some additional snippets for a better understanding: $this->fh = $fileHandle I wrote some code that does the same thing.
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