C# download file from url check file type .zip

I believe the mix of a PK magic number check, file extension, and try catch on unzip will be enough. We originally wanted to avoid using a try catch to determine if the file was a zip but it has to be in there.

Even if we assume a zip on magic number we still need to try catch to determine if the zip is corrupted. I wish I could rep you but too noob right now. We also have reworked how we will upload files to remove some of the ambiguity. Thanks again. CheckSignature pkg, 4, IOHelper. SignatureZip ; Assert. Open, FileAccess. Read, FileShare. Community Bot 1 1 1 silver badge. Kiquenet Kiquenet Wikipedia and other sources have listed that the magic number is not a good way to determine if a file is a zip because it is not required for the file format of a zip.

Alternatively, we would like to avoid try catching but that is the current method. Note: 0xB50 is little endian, so the first byte of the file is 0x50, the second one is 0x4B and so on Philip Johnson Philip Johnson 9 9 silver badges 20 20 bronze badges. Akira Yamamoto Akira Yamamoto 4, 4 4 gold badges 40 40 silver badges 41 41 bronze badges. Seek 0, SeekOrigin. Packaging is able to open, and if package has parts, this is not a zip file.

Open stream, FileMode. Read ; return package. Sign up or log in Sign up using Google. But each time I try to download the file, server returns me an invalid zip file. And when I try to view it on the notepad it contains following lines "Virtual user BD logged in. Top Rated Most Recent. Accept Solution Reject Solution. Posted Jun am DamithSL. It returns an invalid zip file. Can't just read the zip file or copy the contents of zip file into another zip file?

Is there any way to do this? Posted Jun am SoumenBanerjee. And when I open that zip file in notepad it contains a line ""Virtual user BD logged in. Posted Jun am jkirkerx. Posted Jun pm akhilgaur Add your solution here. OK Paste as. Treat my content as plain text, not as HTML. Use optimal compression. CreateFromDirectory "source", "destination.

Store the results in a new folder called "destination". The new folder must not exist. ExtractToDirectory "destination. Move "update. ExtractToDirectory Application. StartupPath ; Refrence. Community Bot 1 1 1 silver badge. Reza Hadipour Reza Hadipour 24 1 1 silver badge 5 5 bronze badges. Version11; request. Read buffer, 0, buffer. Flush ;fs. This code gives error "The remote server returned an error: Forbidden.

Why would this work when DownloadFileAsync does not? I want download file from " nseindia. Sign up or log in Sign up using Google. Collectives on Stack Overflow. Learn more. Downloading file without direct link through C Webclient Ask Question. Asked 2 days ago. Active 2 days ago. Viewed 40 times. Combine directory. FullName, "temp. Now:dd-MM-yyyy HH:mm:ss.

ReportProgress args. Set ; webClient. DownloadFileAsync new Uri url , zipFile.