mirror of
https://github.com/moparisthebest/xeps
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206 lines
8.4 KiB
XML
206 lines
8.4 KiB
XML
<?xml version='1.0' encoding='UTF-8'?>
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<!DOCTYPE xep SYSTEM 'xep.dtd' [
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<!ENTITY % ents SYSTEM 'xep.ent'>
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%ents;
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]>
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<?xml-stylesheet type='text/xsl' href='xep.xsl'?>
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<xep>
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<header>
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<title>Tree Transfer Stream Initiation Profile</title>
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<abstract>A profile describing metadata for transferring trees of files using stream inititation.</abstract>
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&LEGALNOTICE;
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<number>0105</number>
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<status>Deferred</status>
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<type>Standards Track</type>
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<sig>Standards</sig>
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<dependencies>
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<spec>XEP-0095</spec>
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<spec>XEP-0096</spec>
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</dependencies>
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<supersedes/>
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<supersededby/>
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<shortname>si-treetransfer</shortname>
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&reatmon;
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<revision>
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<version>0.3.1</version>
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<date>2018-11-03</date>
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<initials>pep</initials>
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<remark>Fix a bunch of typos, batch-style.</remark>
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</revision>
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<revision>
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<version>0.3</version>
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<date>2003-09-22</date>
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<initials>rwe</initials>
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<remark>Updated directory structure from flat to hierarchical.</remark>
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</revision>
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<revision>
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<version>0.2</version>
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<date>2003-07-23</date>
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<initials>rwe</initials>
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<remark>Fixed bad data types in the schema.</remark>
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</revision>
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<revision>
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<version>0.1</version>
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<date>2003-07-09</date>
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<initials>rwe</initials>
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<remark>Initial version.</remark>
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</revision>
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</header>
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<section1 topic='Introduction'>
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<p>File transfers of entire trees require a lot more metadata and prior setup to link paths to files with unique ids so that clients can track them. This profile provides a more robust method of defining that metadata so that directory trees can be transfered.</p>
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</section1>
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<section1 topic='Requirements'>
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<ul>
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<li>Provide a full featured set of information that is applicable to tree transfers.</li>
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<li>Meta-data that is to be provided:
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<ul>
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<li>number of files</li>
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<li>size of entire tree</li>
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<li>list of files and stream ids</li>
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</ul>
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</li>
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</ul>
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</section1>
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<section1 topic='Usage'>
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<p>The tree transfer profile is in the "http://jabber.org/protocol/si/profile/tree-transfer" namespace. The profile is fairly simple: it consists of the root element with child elements that specify a directory structure of files with stream ids that will be used for each file.</p>
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<p>This profile requires support for the File Transfer profile described in &xep0096;. Once you have accepted this SI, a new SI using the File Transfer profile will be offered for each file in the tree. This profile provides a mapping of files with paths and reserved stream ids which will be used to auto-accept a File Transfer SI that uses that same stream id from the sender.</p>
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<p>The root element is <tree> and has two attributes. The attributes are used only during the offer stage of stream initiation:</p>
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<ul>
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<li><em>size</em> - The size, in bytes, of all of the files to be sent.</li>
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<li><em>numfiles</em> - The number of files/File Transfer SIs that are in the tree.</li>
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</ul>
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<p>The <em>size</em> and <em>numfiles</em> attributes MUST be present in the profile.</p>
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<p>The only possible child element of the root is <directory/> since there are other specifications that handle single file transfers. The directory structure is sent in a hierarchical manner with nested <directory/> and/or <file/> tags. One or more <file/> elements will be sent, one for each file. One or more <directory/> elements will be sent, one for each directory.</p>
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<p>The <directory/> element has one attribute:</p>
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<ul>
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<li><em>name</em> - The name of the directory to create on the target system.</li>
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</ul>
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<p>The attribute is REQUIRED on each <directory/> element.</p>
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<p>The <file/> element has two attributes:</p>
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<ul>
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<li><em>sid</em> - The stream id that MUST be sent for the File Transfer SI.</li>
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<li><em>name</em> - The name of the file. The file should be saved to the same location in the target directory tree as the <directory/> hierarchy defines.</li>
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</ul>
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<p>Both attributes are REQUIRED on each <file/> element. The total number of <file> elements MUST equal the numfiles attribute sent in the <tree/> element.</p>
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<p>The stream-method that is accepted for a Tree Profile SI MUST be remembered and the subsequent File Transfer SIs MUST NOT provide a Feature Negotiation packet. The stream-method has already been chosen and should be used for all of the streams.</p>
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<p>Implementations of this profile MUST support &xep0095; and XEP-0096.</p>
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</section1>
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<section1 topic='Examples'>
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<example caption='Profile Usage in Stream Initiation Offer'><![CDATA[
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<iq type='set' id='offer1' to='receiver@jabber.org/resource'>
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<si
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xmlns='http://jabber.org/protocol/si'
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id='a0'
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profile='http://jabber.org/protocol/si/profile/tree-transfer'>
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<tree
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xmlns='http://jabber.org/profile/si/profile/tree-transfer'
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numfiles='9'
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size='80500'>
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<directory name='cd_collection'>
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<file sid='ft1' name='coll.index'/>
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<directory name='album1'>
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<file sid='ft2' name='song1.mp3'/>
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<file sid='ft3' name='song2.mp3'/>
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<file sid='ft4' name='song3.mp3'/>
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<file sid='ft5' name='song4.mp3'/>
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</directory>
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<directory name='album2'>
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<file sid='ft6' name='song1.mp3'/>
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<file sid='ft7' name='song2.mp3'/>
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<file sid='ft8' name='song3.mp3'/>
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<file sid='ft9' name='song4.mp3'/>
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</directory>
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</directory>
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</tree>
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<feature xmlns='http://jabber.org/protocol/feature-neg'>
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<x xmlns='jabber:x:data'>
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<field var='stream-method' type='list-single'>
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<option><value>http://jabber.org/protocol/bytestreams</value></option>
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<option><value>http://jabber.org/protocol/ibb</value></option>
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</field>
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</x>
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</feature>
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</si>
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</iq>
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]]></example>
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<example caption='Simple Profile Usage in Stream Initiation Result'><![CDATA[
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<iq type='result' to='sender@jabber.org/resource' id='offer1'>
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<si xmlns='http://jabber.org/protocol/si'>
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<feature xmlns='http://jabber.org/protocol/feature-neg'>
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<x xmlns='jabber:x:data' type='submit'>
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<field var='stream-method'>
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<value>http://jabber.org/protocol/bytestreams</value>
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</field>
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</x>
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</feature>
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</si>
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</iq>
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]]></example>
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<example caption='Subsequent File Transfer Offer'><![CDATA[
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<iq type='set' id='offer2' to='receiver@jabber.org/resource'>
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<si xmlns='http://jabber.org/protocol/si'
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id='ft1'
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mime-type='text/plain'
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profile='http://jabber.org/protocol/si/profile/file-transfer'>
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<file xmlns='http://jabber.org/protocol/si/profile/file-transfer'
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name='coll.index'
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size='500'/>
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</si>
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</iq>
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]]></example>
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<example caption='Subsequent File Transfer Result'><![CDATA[
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<iq type='result' to='sender@jabber.org/resource' id='offer2'>
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<si xmlns='http://jabber.org/protocol/si'/>
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</iq>
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]]></example>
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<p>Above is repeated for ft2, ft3, etc...</p>
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</section1>
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<section1 topic='IANA Considerations'>
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<p>
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No interaction with &IANA; is required as a result of this document.
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</p>
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</section1>
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<section1 topic='XMPP Registrar Considerations'>
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<p>
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The profile described in this document will be registered with ®ISTRAR; as a valid Stream
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Initiation profile.
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</p>
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</section1>
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<section1 topic='XML Schema'>
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<code><![CDATA[
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<?xml version='1.0' encoding='UTF-8'?>
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<xs:schema
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xmlns:xs='http://www.w3.org/2001/XMLSchema'
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targetNamespace='http://jabber.org/protocol/si/profile/tree-transfer'
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xmlns='http://jabber.org/protocol/si/profile/tree-transfer'
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elementFormDefault='qualified'>
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<xs:element name='tree'>
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<xs:complexType>
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<xs:attribute name='numfiles' use='required' type='xs:integer'/>
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<xs:attribute name='size' use='required' type='xs:integer'/>
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<xs:element ref='directory' minOccurs='0' maxOccurs='1'/>
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</xs:complexType>
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</xs:element>
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<xs:element name='directory'>
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<xs:complexType>
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<xs:attribute name='name' use='required' type='xs:string'/>
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<xs:element ref='directory' minOccurs='0' maxOccurs='unbounded'/>
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<xs:element ref='file' minOccurs='0' maxOccurs='unbounded'/>
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</xs:complexType>
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</xs:element>
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<xs:element name='file'>
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<xs:complexType>
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<xs:attribute name='name' use='required' type='xs:string'/>
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<xs:attribute name='sid' use='required' type='xs:string'/>
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</xs:complexType>
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</xs:element>
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</xs:schema>
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]]></code>
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</section1>
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</xep>
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