Hello,
I cannot post the actual code I added to slide to get this to work,
but I will verbally describe what I did. This fix/patch will only
work with webdav servers that support the Content-Range header for
PUTs. At the moment, I only know of Apache's mod_dav that supports
it, but that doesn't mean others don't. Also, I have only tested
this with Apache's mod_dav. Here's the specifics on what I am using:
Slide 2.1
Apache/1.3.33 (Darwin)
DAV/1.0.3
In WebdavResource.java, I copied the method 'public boolean putMethod
(String path, byte[] data)', renamed it to putPartialMethod, and
added three more arguments to it: the beginning index, the ending
index, and the full length of the file/resource. In the method, I
keep everything exactly the same but add a few lines to add the
Content-Range header. Here are the rules about the Content-Range
header: http://www.w3.org/Protocols/rfc2616/rfc2616-
sec14.html#sec14.16 .
The caller of putPartialMethod should only pass the chunk of the file/
resource that should be uploaded. And the data argument's length
should be the exact length of the chunk being uploaded. So the data
argument's length should be (ending index - beginning index + 1).
That's about it. Here's a few items to remember when using the
putPartialMethod ....
- The beginning and ending indexes are inclusive. So, if you upload
bytes 4-7 of a file with length 9, then bytes 4, 5, 6, and 7 will be
uploaded. http://www.w3.org/Protocols/rfc2616/rfc2616-
sec14.html#sec14.16 has an example.
- The ending index cannot be equal to the full file's length. So, if
a file's length is 9 and you want to upload all the bytes, then the
beginning index would be 0 and the ending index would be 8.
We have found the putPartialMethod to be useful for resumed uploads
and for logging a file's upload progress. We upload a chunk of a
file, log the progress, upload a chunk, log the progress, etc.
Hope that helps,
Tiff
On Aug 24, 2006, at 12:19 PM, Tiffany Dodge wrote:
Hello,
I recently read that Apache's mod_dav supports PUTs with the
Content-Range header and I am interested in using it.
I am working on a non-gui client app that uses slide. I added a
new put method to slide (to WebdavResource.java, specifically) that
adds the Content-Range header. Basically, I copied one of the
existing put methods (the one that takes a path and file argument)
and just added the bit of code that adds the Content-Range header.
It did not work; webdav had the full file (not the chunk
specified). I was wondering if anyone else had tried this and if
they had been successful? Here are the headers from the test I
used ....
request headers ...
[DEBUG] wire - ->> "PUT /blahDir/blah.aes HTTP/1.1[\r][\n]"
[DEBUG] wire - ->> "Content-Range: bytes 0-524288/2945360[\r][\n]"
[DEBUG] wire - ->> "Content-Type: httpd/unix-directory[\r][\n]"
[DEBUG] wire - ->> "User-Agent: Jakarta Commons-HttpClient/2.0final
[\r][\n]"
[DEBUG] wire - ->> "Host: blah.blah.com[\r][\n]"
[DEBUG] wire - ->> "Content-Length: 2945360[\r][\n]"
[DEBUG] wire - ->> "[\r][\n]"
response headers ...
[DEBUG] wire - -<< "HTTP/1.1 201 Created[\r][\n]"
[DEBUG] wire - -<< "Date: Thu, 24 Aug 2006 01:31:52 GMT[\r][\n]"
[DEBUG] wire - -<< "Server: Apache/1.3.33 (Darwin) PHP/5.1.2
mod_fastcgi/2.4.2 DAV/1.0.3 mod_ssl/2.8.24 OpenSSL/0.9.7i[\r][\n]"
[DEBUG] wire - -<< "Cache-Control: max-age=60[\r][\n]"
[DEBUG] wire - -<< "Expires: Thu, 24 Aug 2006 01:32:52 GMT[\r][\n]"
[DEBUG] wire - -<< "Connection: close[\r][\n]"
[DEBUG] wire - -<< "Transfer-Encoding: chunked[\r][\n]"
[DEBUG] wire - -<< "Content-Type: text/html[\r][\n]"
Any help would be appreciated.
Thanks,
Tiff
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