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241 lines
16 KiB
HTML
241 lines
16 KiB
HTML
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<ol class="chapter"><li class="chapter-item expanded "><a href="installation.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="running-sync-server.html"><strong aria-hidden="true">1.1.</strong> Running the Sync Server</a></li></ol></li><li class="chapter-item expanded "><a href="internals.html"><strong aria-hidden="true">2.</strong> Internal Details</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="data-model.html"><strong aria-hidden="true">2.1.</strong> Data Model</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="storage.html"><strong aria-hidden="true">2.1.1.</strong> Replica Storage</a></li><li class="chapter-item expanded "><a href="taskdb.html"><strong aria-hidden="true">2.1.2.</strong> Task Database</a></li><li class="chapter-item expanded "><a href="tasks.html"><strong aria-hidden="true">2.1.3.</strong> Tasks</a></li></ol></li><li class="chapter-item expanded "><a href="sync.html"><strong aria-hidden="true">2.2.</strong> Synchronization and the Sync Server</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="sync-model.html"><strong aria-hidden="true">2.2.1.</strong> Synchronization Model</a></li><li class="chapter-item expanded "><a href="snapshots.html"><strong aria-hidden="true">2.2.2.</strong> Snapshots</a></li><li class="chapter-item expanded "><a href="sync-protocol.html"><strong aria-hidden="true">2.2.3.</strong> Server-Replica Protocol</a></li><li class="chapter-item expanded "><a href="encryption.html"><strong aria-hidden="true">2.2.4.</strong> Encryption</a></li><li class="chapter-item expanded "><a href="http.html" class="active"><strong aria-hidden="true">2.2.5.</strong> HTTP Implementation</a></li><li class="chapter-item expanded "><a href="object-store.html"><strong aria-hidden="true">2.2.6.</strong> Object-Store Implementation</a></li><li class="chapter-item expanded "><a href="plans.html"><strong aria-hidden="true">2.2.7.</strong> Planned Functionality</a></li></ol></li></ol></li></ol> </div>
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<h1 class="menu-title">TaskChampion</h1>
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<main>
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<h1 id="http-representation"><a class="header" href="#http-representation">HTTP Representation</a></h1>
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<p>The transactions in the sync protocol are realized for an HTTP server at <code><origin></code> using the HTTP requests and responses described here.
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The <code>origin</code> <em>should</em> be an HTTPS endpoint on general principle, but nothing in the functonality or security of the protocol depends on connection encryption.</p>
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<p>The replica identifies itself to the server using a <code>client_id</code> in the form of a UUID.
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This value is passed with every request in the <code>X-Client-Id</code> header, in its dashed-hex format.</p>
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<p>The salt used in key derivation is the SHA256 hash of the 16-byte form of the client ID.</p>
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<h2 id="addversion"><a class="header" href="#addversion">AddVersion</a></h2>
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<p>The request is a <code>POST</code> to <code><origin>/v1/client/add-version/<parentVersionId></code>.
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The request body contains the history segment, optionally encoded using any encoding supported by actix-web.
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The content-type must be <code>application/vnd.taskchampion.history-segment</code>.</p>
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<p>The success response is a 200 OK with an empty body.
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The new version ID appears in the <code>X-Version-Id</code> header.
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If included, a snapshot request appears in the <code>X-Snapshot-Request</code> header with value <code>urgency=low</code> or <code>urgency=high</code>.</p>
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<p>On conflict, the response is a 409 CONFLICT with an empty body.
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The expected parent version ID appears in the <code>X-Parent-Version-Id</code> header.</p>
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<p>Other error responses (4xx or 5xx) may be returned and should be treated appropriately to their meanings in the HTTP specification.</p>
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<h2 id="getchildversion"><a class="header" href="#getchildversion">GetChildVersion</a></h2>
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<p>The request is a <code>GET</code> to <code><origin>/v1/client/get-child-version/<parentVersionId></code>.</p>
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<p>The response is determined as described above.
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The <em>not-found</em> response is 404 NOT FOUND.
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The <em>gone</em> response is 410 GONE.
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Neither has a response body.</p>
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<p>On success, the response is a 200 OK.
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The version's history segment is returned in the response body, with content-type <code>application/vnd.taskchampion.history-segment</code>.
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The version ID appears in the <code>X-Version-Id</code> header.
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The response body may be encoded, in accordance with any <code>Accept-Encoding</code> header in the request.</p>
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<p>On failure, a client should treat a 404 NOT FOUND as indicating that it is up-to-date.
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Clients should treat a 410 GONE as a synchronization error.
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If the client has pending changes to send to the server, based on a now-removed version, then those changes cannot be reconciled and will be lost.
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The client should, optionally after consulting the user, download and apply the latest snapshot.</p>
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<h2 id="addsnapshot"><a class="header" href="#addsnapshot">AddSnapshot</a></h2>
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<p>The request is a <code>POST</code> to <code><origin>/v1/client/add-snapshot/<versionId></code>.
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The request body contains the snapshot data, optionally encoded using any encoding supported by actix-web.
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The content-type must be <code>application/vnd.taskchampion.snapshot</code>.</p>
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<p>If the version is invalid, as described above, the response should be 400 BAD REQUEST.
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The server response should be 200 OK on success.</p>
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<h2 id="getsnapshot"><a class="header" href="#getsnapshot">GetSnapshot</a></h2>
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<p>The request is a <code>GET</code> to <code><origin>/v1/client/snapshot</code>.</p>
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<p>The response is a 200 OK.
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The snapshot is returned in the response body, with content-type <code>application/vnd.taskchampion.snapshot</code>.
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The version ID appears in the <code>X-Version-Id</code> header.
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The response body may be encoded, in accordance with any <code>Accept-Encoding</code> header in the request.</p>
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<p>After downloading and decrypting a snapshot, a client must replace its entire local task database with the content of the snapshot.
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Any local operations that had not yet been synchronized must be discarded.
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After the snapshot is applied, the client should begin the synchronization process again, starting from the snapshot version.</p>
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