Commented a lot of functions. Tried to get jsDoc and/or docco to work

Packages/dicomweb/lib/findIndexOfString.js

@@ -0,0 +1,49 @@
+/**
+ * Converts a String to a UInt8 array of character codes
+ * @param {String} str Input string
+ * @returns {Uint8Array} Uint8 Array of character codes
+ */
+function stringToUint8Array(str) {
+    var uint=new Uint8Array(str.length);
+    for(var i=0,j=str.length;i<j;i++){
+        uint[i]=str.charCodeAt(i);
+    }
+    return uint;
+}
+
+function checkToken(token, data, dataOffset) {
+    if(dataOffset + token.length > data.length) {
+        //console.log('dataOffset >> ', dataOffset);
+        return false;
+    }
+
+    for(var i = 0; i < token.length; i++) {
+        if(token[i] !== data[endIndex++]) {
+            if(endIndex > 520000) {
+                console.log('token=',uint8ArrayToString(token));
+                console.log('data=', uint8ArrayToString(data, dataOffset, endIndex-dataOffset));
+                console.log('miss at %d %s dataOffset=%d', i, String.fromCharCode(data[endIndex]), endIndex);
+                console.log('miss at %d %s dataOffset=%d', i, String.fromCharCode(token[endIndex]), endIndex);
+            }
+            return false;
+        }
+    }
+    return true;
+}
+
+
+findIndexOfString = function(data, str, offset) {
+    offset = offset || 0;
+
+    var token = stringToUint8Array(str);
+
+    for(var i=offset; i < data.length; i++) {
+        if(data[i] === token[0]) {
+            //console.log('match @', i);
+            if(checkToken(token, data, i)) {
+                return i;
+            }
+        }
+    }
+    return -1;
+};

Packages/dicomweb/lib/uint8ArrayToString.js

@@ -0,0 +1,17 @@
+/**
+ * Converts a Uint8 array to a string
+ * @param data
+ * @param offset
+ * @param length
+ * @returns {string}
+ */
+uint8ArrayToString = function(data, offset, length) {
+    offset = offset || 0;
+    length = length || data.length - offset;
+    var str = "";
+
+    for(var i=offset; i < offset + length; i++) {
+        str += String.fromCharCode(data[i]);
+    }
+    return str;
+};

Packages/dicomweb/package.js

@@ -7,6 +7,7 @@ Package.describe({
 Package.onUse(function (api) {
     api.use('http');
 
+    // DICOMWeb API functions
     api.addFiles('server/namespace.js', 'server');
     api.addFiles('server/getImageFrame.js', 'server');
     api.addFiles('server/getJSON.js', 'server');
@@ -14,6 +15,10 @@ Package.onUse(function (api) {
     api.addFiles('server/getNumber.js', 'server');
     api.addFiles('server/getString.js', 'server');
 
+    // Helper functions
+    api.addFiles('lib/findIndexOfString.js', 'server');
+    api.addFiles('lib/uint8ArrayToString.js', 'server');
+
     api.export("DICOMWeb", 'server');
 });