[WIP] feat: Add a DICOMweb proxy capability to the webserver

packages/static-wado-creator/lib/mkdicomwebConfig.js

@@ -4,6 +4,7 @@ const createMain = require("./createMain");
 const createPart10 = require("./createPart10");
 const deleteMain = require("./deleteMain");
 const rejectMain = require("./rejectMain");
+const queryMain = require("./queryMain");
 const instanceMain = require("./instanceMain");
 const indexMain = require("./indexMain");
 const groupMain = require("./groupMain");
@@ -83,6 +84,10 @@ const { mkdicomwebConfig } = ConfigPoint.register({
         key: "-e, --no-encapsulated-image",
         description: "Avoid encapsulating the image frame.  Writes with the extension and without multipart",
       },
+      {
+        key: "--singlepart-bulkdata",
+        description: "Store bulkdata as single part data",
+      },
       {
         key: "--single-part-image",
         description: "Writes single part image data",
@@ -234,6 +239,11 @@ const { mkdicomwebConfig } = ConfigPoint.register({
         main: rejectMain,
         helpDescription: "Reject the specified series",
       },
+      {
+        command: "query <url>",
+        main: queryMain,
+        helpDescription: "Performs DICOMweb query operations to update local deduplicated/metadata",
+      },
     ],
   },
 });

packages/static-wado-creator/lib/query/retrieveJson.js

@@ -0,0 +1,23 @@
+const https = require("https");
+
+/** Retrieve the given url fromm the back end, returning a JSON representation of the data */
+module.exports = function retrieve(url, options) {
+  console.log("Requesting to retrieve", url);
+  const parsedUrl = new URL(url);
+  const req = https.request(parsedUrl, (res) => {
+    console.log(`STATUS: ${res.statusCode}`);
+    console.log(`HEADERS: ${JSON.stringify(res.headers)}`);
+    res.setEncoding('utf8');
+    res.on('data', (chunk) => {
+      console.log(`BODY: ${chunk}`);
+    });
+    res.on('end', () => {
+      console.log('No more data in response.');
+    });
+  });
+  req.on('error', (e) => {
+    console.error(`problem with request: ${e.message}`);
+  });
+
+  req.end();
+}

packages/static-wado-creator/lib/queryMain.js

@@ -0,0 +1,57 @@
+const StaticWado = require("./StaticWado");
+const adaptProgramOpts = require("./util/adaptProgramOpts");
+const retrieveJson = require("./query/retrieveJson");
+
+/**
+ * Queries the given URL instance.
+ * Options:
+ *   * metadata 
+ *      Appends /series to the URL and tries to retrieve
+ *      Stores the data in the `series` key
+ *      Iterates over all series in the list and checks if the series is up to date
+ *      For each series not up to date:
+ *         * `series/<seriesInstanceUID>/metadata` stored to a key of the same name
+ *         * Iterates over all instances in above and adds to `StudyData`
+ *      Writes updated study data files (recreated from new deduplciated data)
+ *   * cache - will cache all queried files
+ *   * stream - will print the response directly to the standard output.
+ *   * deduplicated
+ *      Reads the /deduplicated path first
+ *      If no object, and the `metadata` option is set, then runs that path
+ *      If the object is found, then writes the deduplicated data to the deduplicated path
+ *      Runs the regular metadata create path
+ * 
+ * Retrieving individual instances for proxying cached data.
+ * Data can be read from disk once this is complete.
+ *    `mkdicomweb query 1.2.3/series --cache`
+ *    `mkdicomweb query 1.2.3/series/2.3.4/metadata --cache`
+ * 
+ * Retrieving a study query for direct proxy:
+ * Data can be streamed directly from the command line.
+ *    `mkdicomweb query 1.2.3?ModalitiesInStudy=CR --stream`
+ * 
+ * Creates or Updates Deduplicated Metadata:
+ * This command should be used before receiving data against remote proxies NOT supporting deduplicated
+ *    `mkdicomweb query 1.2.3 --metadata`
+ * 
+ * Creates or Updates Deduplicated Metadata from Deduplicated Remote
+ * This command should be used before receiving data against remote proxies supporting deduplicated
+ *   `mkdicomweb query 1.2.3 --deduplicated`
+ * 
+ * @param {*} url to fetch 
+ * @param {*} options 
+ * @param {*} program 
+ */
+module.exports = function queryMain(url, options) {
+  const finalOptions = adaptProgramOpts(options, {
+    ...this,
+    isGroup: true,
+    isStudyData: true,
+  });
+  const importer = new StaticWado(finalOptions);
+  const useUrl = url.indexOf('http')===-1 ? `${this.dicomwebUrl}/studies/${url}` : url;
+  console.log("Import from", useUrl);
+  retrieveJson(url, options).then(json => {
+    console.log("Retrieved:", JSON.stringify(json,null,2));
+  });
+};

packages/static-wado-creator/lib/writer/HashDataWriter.js

@@ -33,6 +33,7 @@ const HashDataWriter =
   (options) =>
   async (id, key, data, additionalOptions = {}) => {
     const isRaw = ArrayBuffer.isView(data);
+    const { singlepartBulkdata } = options;
     const { mimeType } = additionalOptions;
     // If the file has an extension, it should be directly accessible as that file type.
     const gzip = !isRaw || (data.length > 1024 && !mimeType);
@@ -43,7 +44,7 @@ const HashDataWriter =
       mkdir: true,
       gzip,
     });
-    if (isRaw) {
+    if (isRaw && !singlepartBulkdata) {
       await WriteMultipart(writeStream, [new MultipartHeader("Content-Type", "application/octet-stream")], rawData);
     } else {
       await writeStream.write(rawData);