From: kevan Date: Mon, 10 Oct 2011 02:55:29 +0000 (-0700) Subject: docs/frontends/webapi.rst: document the format argument X-Git-Url: https://git.rkrishnan.org/pf/content/%22news.html/frontends/status?a=commitdiff_plain;h=bd642739cb5b4771e1e1bf73724333db774d0348;p=tahoe-lafs%2Ftahoe-lafs.git docs/frontends/webapi.rst: document the format argument --- diff --git a/docs/frontends/webapi.rst b/docs/frontends/webapi.rst index 1545a164..7f6cf47a 100644 --- a/docs/frontends/webapi.rst +++ b/docs/frontends/webapi.rst @@ -378,8 +378,17 @@ Writing/Uploading A File file is replaced with the data from the HTTP request body. For an immutable file, the "offset" parameter is not valid. - When creating a new file, if "mutable=true" is in the query arguments, the - operation will create a mutable file instead of an immutable one. + When creating a new file, you can control the type of file created by + specifying a format= argument in the query string. format=mdmf creates an MDMF + mutable file. format=sdmf creates an SDMF mutable file. format=chk creates an + immutable file. The value of the format argument is case-insensitive. For + compatibility with previous versions of Tahoe-LAFS, the webapi will also + accept a mutable=true argument in the query string. If mutable=true is given, + then the new file will be mutable, and its format will be the default mutable + file format, as configured on the Tahoe-LAFS node hosting the webapi server. + Use of mutable=true is discouraged; new code should use format= instead of + mutable=true. If neither format= nor mutable=true are given, the + newly-created file will be immutable. This returns the file-cap of the resulting file. If a new file was created by this method, the HTTP response code (as dictated by rfc2616) will be set @@ -395,19 +404,9 @@ Writing/Uploading A File attach the file into the filesystem. No directories will be modified by this operation. The file-cap is returned as the body of the HTTP response. - If "mutable=true" is in the query arguments, the operation will create a - mutable file, and return its write-cap in the HTTP respose. The default is - to create an immutable file, returning the read-cap as a response. If - you create a mutable file, you can also use the "mutable-type" query - parameter. If "mutable-type=sdmf", then the mutable file will be created - in the old SDMF mutable file format. This is desirable for files that - need to be read by old clients. If "mutable-type=mdmf", then the file - will be created in the new MDMF mutable file format. MDMF mutable files - can be downloaded more efficiently, and modified in-place efficiently, - but are not compatible with older versions of Tahoe-LAFS. If no - "mutable-type" argument is given, the file is created in whatever - format was configured in tahoe.cfg. - + This method accepts format= and mutable=true as query string arguments, and + interprets those arguments in the same way as the linked forms of PUT + described immediately above. Creating A New Directory ------------------------ @@ -421,12 +420,23 @@ Creating A New Directory filesystem. The "PUT" operation is provided for backwards compatibility: new code should use POST. + This supports a format= argument in the query string. The format= + argument, if specified, controls the format of the directory. format=mdmf + indicates that the directory should be stored as an MDMF file; format=sdmf + indicates that the directory should be stored as an SDMF file. The value of + the format= argument is case-insensitive. If no format= argument is + given, the directory's format is determined by the default mutable file + format, as configured on the Tahoe-LAFS node responding to the request. + ``POST /uri?t=mkdir-with-children`` Create a new directory, populated with a set of child nodes, and return its write-cap as the HTTP response body. The new directory is not attached to any other directory: the returned write-cap is the only reference to it. + The format of the directory can be controlled with the format= argument in + the query string, as described above. + Initial children are provided as the body of the POST form (this is more efficient than doing separate mkdir and set_children operations). If the body is empty, the new directory will be empty. If not empty, the body will @@ -538,6 +548,14 @@ Creating A New Directory If the final directory is created, it will be empty. + This accepts a format= argument in the query string, which controls the + format of the named target directory, if it does not already exist. format= + is interpreted in the same way as in the POST /uri?t=mkdir form. Note that + format= only controls the format of the named target directory; + intermediate directories, if created, are created based on the default + mutable type, as configured on the Tahoe-LAFS server responding to the + request. + This operation will return an error if a blocking file is present at any of the parent names, preventing the server from creating the necessary parent directory; or if it would require changing an immutable directory. @@ -552,6 +570,14 @@ Creating A New Directory intermediate mutable directories as necessary. If the final directory is created, it will be populated with initial children from the POST request body, as described above. + + This accepts a format= argument in the query string, which controls the + format of the target directory, if the target directory is created as part + of the operation. format= is interpreted in the same way as in the POST/ + uri?t=mkdir-with-children operation. Note that format= only controls the + format of the named target directory; intermediate directories, if created, + are created using the default mutable type setting, as configured on the + Tahoe-LAFS server responding to the request. This operation will return an error if a blocking file is present at any of the parent names, preventing the server from creating the necessary parent @@ -576,6 +602,14 @@ Creating A New Directory Create a new empty mutable directory and attach it to the given existing directory. This will create additional intermediate directories as necessary. + This accepts a format= argument in the query string, which controls the + format of the named target directory, if it does not already exist. format= + is interpreted in the same way as in the POST /uri?t=mkdir form. Note that + format= only controls the format of the named target directory; + intermediate directories, if created, are created based on the default + mutable type, as configured on the Tahoe-LAFS server responding to the + request. + This operation will return an error if a blocking file is present at any of the parent names, preventing the server from creating the necessary parent directory, or if it would require changing any immutable directory. @@ -589,7 +623,15 @@ Creating A New Directory Like /uri/$DIRCAP/[SUBDIRS../]?t=mkdir&name=NAME, but the new directory will be populated with initial children via the POST request body. This command will create additional intermediate mutable directories as necessary. - + + This accepts a format= argument in the query string, which controls the + format of the target directory, if the target directory is created as part + of the operation. format= is interpreted in the same way as in the POST/ + uri?t=mkdir-with-children operation. Note that format= only controls the + format of the named target directory; intermediate directories, if created, + are created using the default mutable type setting, as configured on the + Tahoe-LAFS server responding to the request. + This operation will return an error if a blocking file is present at any of the parent names, preventing the server from creating the necessary parent directory; or if it would require changing an immutable directory; or if @@ -635,7 +677,8 @@ Getting Information About A File Or Directory (as JSON) "ro_uri": file_uri, "verify_uri": verify_uri, "size": bytes, - "mutable": false + "mutable": false, + "format": "chk" } ] If it is a capability to a directory followed by a path from that directory @@ -649,6 +692,7 @@ Getting Information About A File Or Directory (as JSON) "verify_uri": verify_uri, "size": bytes, "mutable": false, + "format": "chk", "metadata": { "ctime": 1202777696.7564139, "mtime": 1202777696.7564139, @@ -672,6 +716,7 @@ Getting Information About A File Or Directory (as JSON) "ro_uri": read_only_uri, "verify_uri": verify_uri, "mutable": true, + "format": "sdmf", "children": { "foo.txt": [ "filenode", { "ro_uri": uri, @@ -1031,7 +1076,7 @@ Getting Information About A File Or Directory (as HTML) * access caps (URIs): verify-cap, read-cap, write-cap (for mutable objects) * check/verify/repair form * deep-check/deep-size/deep-stats/manifest (for directories) - * replace-conents form (for mutable files) + * replace-contents form (for mutable files) Creating a Directory @@ -1051,6 +1096,10 @@ Creating a Directory /uri/$DIRCAP page. There is a "create directory" button on the Welcome page to invoke this action. + This accepts a format= argument in the query string. Refer to the + documentation of the PUT /uri?t=mkdir operation in `Creating A + New Directory`_ for information on the behavior of the format= argument. + If "redirect_to_result=true" is not provided (or is given a value of "false"), then the HTTP response body will simply be the write-cap of the new directory. @@ -1060,6 +1109,11 @@ Creating a Directory This creates a new empty directory as a child of the designated SUBDIR. This will create additional intermediate directories as necessary. + This accepts a format= argument in the query string. Refer to the + documentation of POST /uri/$DIRCAP/[SUBDIRS../]?t=mkdir&name=CHILDNAME in + `Creating A New Directory`_ for information on the behavior of the format= + argument. + If a "when_done=URL" argument is provided, the HTTP response will cause the web browser to redirect to the given URL. This provides a convenient way to return the browser to the directory that was just modified. Without a @@ -1096,17 +1150,9 @@ Uploading a File about which storage servers were used for the upload, how long each operation took, etc. - If a "mutable=true" argument is provided, the operation will create a - mutable file, and the response body will contain the write-cap instead of - the upload results page. The default is to create an immutable file, - returning the upload results page as a response. If you create a - mutable file, you may choose to specify the format of that mutable file - with the "mutable-type" parameter. If "mutable-type=mdmf", then the - file will be created as an MDMF mutable file. If "mutable-type=sdmf", - then the file will be created as an SDMF mutable file. If no value is - specified, the file will be created in whatever format is specified in - tahoe.cfg. - + This accepts format= and mutable=true query string arguments. Refer to + `Writing/Uploading A File`_ for information on the behavior of format= and + mutable=true. ``POST /uri/$DIRCAP/[SUBDIRS../]?t=upload`` @@ -1142,9 +1188,9 @@ Uploading a File /uri/$DIRCAP/[SUBDIRS../]", it is likely that the parent directory will already exist. - If a "mutable=true" argument is provided, any new file that is created will - be a mutable file instead of an immutable one. will give the user a way to set this option. + This accepts format= and mutable=true query string arguments. Refer to + `Writing/Uploading A File`_ for information on the behavior of format= and + mutable=true. If a "when_done=URL" argument is provided, the HTTP response will cause the web browser to redirect to the given URL. This provides a convenient way to