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https://github.com/aria2/aria2.git
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94 lines
3.5 KiB
Plaintext
94 lines
3.5 KiB
Plaintext
aria2 - The high speed download utility
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1. Disclaimer
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-------------
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This program comes with no warranty.
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You must use this program at your own risk.
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2. About aria2
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--------------
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aria2 has segmented downloading engine in its core. By segmented downloading,
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it can download files very much faster than ordinary browsers.
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aria2 is in very early development stage. Currently it has following features:
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* HTTP/HTTPS GET support
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* HTTP Proxy support
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* HTTP BASIC authentication support
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* HTTP Proxy authentication support
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* FTP support(active, passive mode)
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* FTP through HTTP proxy(GET command or tunneling)
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* Segmented download
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* Cookie support(currently aria2 ignores "expires")
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* It can run as a daemon process.
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* BitTorrent protocol support with fast extension.
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* Selective download in multi-file torrent
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* Metalink version 3.0 support(HTTP/FTP/BitTorrent).
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3. How to build
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---------------
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$ ./configure
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$ make
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The executable is aria2c in src directory.
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4. Dependency
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-------------
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In order to enable HTTPS support, you need GNU TLS or OpenSSL.
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In order to enable BitTorrent support, you need GNU TLS+libgcrypt or OpenSSL.
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In order to enable Metalink support, you need libxml2. Optionally GNU TLS+
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libgcrypt or OpenSSL are required for checksum checking support(MD5, SHA1).
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GNU TLS has precedence over OpenSSL if both libraries are installed.
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If you prefer OpenSSL, run configure with "--without-gnutls".
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You can disable BitTorrent, Metalink support by providing --disable-bittorrent,
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--disable-metalink respectively to configure script.
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5. BitTorrrent
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--------------
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The filename of the downloaded file is determined as follows:
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single-file mode:
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If "name" key is present in .torrent file, filename is the value of "name"
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key. Otherwise, filename is the basename of .torrent file appended by
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".file". For example, .torrent file is "test.torrrent", then filename is
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"test.torrent.file".
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The directory to store the downloaded file can be specified by -d option.
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multi-file mode:
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The complete directory/file structure mentioned in .torrent file is
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created.
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The directory to store the top directory of downloaded files can be
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specified by -d option.
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In the default behavior, before download starts, complete directory structure
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is created if needed. Then aria2 opens all files mentioned in .torrent file,
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directly writes to and reads from these files.
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NOTE: Even in selective download, all files are opened.
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If "--direct-file-mapping" option set to be false, aria2 creates temporary
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file in the store directory. The length of this file is the sum of length of
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the files in .torrent file, so at least 2 times more disk space than the file
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size itself is required. Writing and reading is done against this file.
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After download completes, aria2 creates complete directory structure if needed,
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and copies whole file or a part of it to the destination.
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Note:
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* -o option is used to change the filename of downloaded .torrent file.
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* This version only supports compact peers list format.
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* The ports aria2c uses are 6881-6999.
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* The maximum number of peers is 55.
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* After selective download completes, aria2 is going to download rest of the
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files.
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6. Metalink
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-----------
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The current implementation supports HTTP/FTP/BitTorrent.
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BitTorrent always has precedence over HTTP/FTP.
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The other P2P protocols are ignored.
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For checksum checking, both MD5 and SHA1 are supported. If both values are
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provided, then aria2 uses SHA1. If checksum checking is failed, aria2 doesn't
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retry the download and just exits with non-zero return code.
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The supported user preferences are version, language and os.
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