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From: | Hubert Tarasiuk |
Subject: | Re: [Bug-wget] Metalink support |
Date: | Sat, 4 Jul 2015 01:44:54 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.0.1 |
W dniu 04.07.2015 o 00:15, Anthony Bryan pisze: >> >> Of course it works for me, but we are not talking about me :-) >> >> The main question is: what does the typical wget user expect ? >> I would thinks (s)he expects the download of the file described by the >> .metalink file. Of course a few users really want to have only the .metalink >> file (for testing/inspection). So there should be a possibility to do exactly >> that (e.g. --keep-metalink). >> >> Before making any decision/action we should wait for some other voices. > > I'm not sure what the typical wget user expects, but here are some examples. > > if you keep the current behavior, it might be helpful to print to the > user that they've downloaded a metalink, and how to make wget use it. > > aria2 (another command line metalink downloader) uses these commands > to download the metalink and process it (download the file described > by it & do a hash check) by default. you have to specify > '--follow-metalink=false' to only download the metalink XML file. I like that option. Also, I am including the amended patches. There was an issue with freeing memory when the Metalink parsing failed (I have moved the metalink_delete call from outside to inside of the 'else' block in main.c:1806). > > curl on the other hand just downloads the metalink XML file by default > (like any other file), and requires a '--metalink' option to process a > local file or URL. (examples & help/man pages follow) > > aria2c URL > or > aria2c --metalink-file=filename > > aria2 help: > > -M, --metalink-file=METALINK_FILE The file path to the .meta4 and .metalink > > file. Reads input from stdin when '-' is > > specified. > > > Possible Values: /path/to/file, - > > > --follow-metalink=true|false|mem If true or mem is specified, when a file > > whose suffix is .meta4 or .metalink, or content > > type of application/metalink4+xml or > > application/metalink+xml is downloaded, aria2 > > parses it as a metalink file and downloads files > > mentioned in it. > > If mem is specified, a metalink file is not > > written to the disk, but is just kept in memory. > > If false is specified, the .metalink file is > > downloaded to the disk, but is not parsed as a > > metalink file and its contents are not > > downloaded. > > > Possible Values: true, mem, false > > Default: true > > > > from the curl man page: > > --metalink > > This option can tell curl to parse and process a given > URI as Metalink file (both version 3 and 4 (RFC 5854) > > are supported) and make use of the mirrors listed within > for failover if there are errors (such as the file > > or server not being available). It will also verify > the hash of the file after the download completes. The > > Metalink file itself is downloaded and processed in > memory and not stored in the local file system. > > > Example to use a remote Metalink file: > > > curl --metalink http://www.example.com/example.metalink > > > To use a Metalink file in the local file system, use > FILE protocol (file://): > > > curl --metalink file://example.metalink > > > Please note that if FILE protocol is disabled, there is > no way to use a local Metalink file at the time of > > this writing. Also note that if --metalink and > --include are used together, --include will be ignored. This > > is because including headers in the response will break > Metalink parser and if the headers are included in > > the file described in Metalink file, hash check will fail. > >
0001-Metalink-support.patch
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0002-Start-HTTP-test-only-when-calling-begin.patch
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0003-Test-case-for-Metalink-in-XML.patch
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0004-Support-multiple-headers-with-same-name-in-Python-te.patch
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0005-Test-case-for-Metalink-over-HTTP.patch
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0006-Unit-test-for-find_key_value.patch
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0007-Unit-test-for-has_key.patch
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0008-Unit-test-for-find_key_values.patch
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0009-Move-some-Metalink-related-code-from-http.c-to-metal.patch
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0010-Support-at-most-one-file-signature.-Adapt-comments-t.patch
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0011-Geolocation-support-for-Metalink-resources.patch
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0012-Test-preferred-location-in-Metalink-over-HTTP-test-c.patch
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