Report error when blocking via api. Updated documentation. Report % compression via log file.

Author: Keith Ball

README.md

@@ -20,7 +20,7 @@ _Image taken from blogs.dropbox.com_
 
 If a change is made to the video file, for example an extra 1mb of data is appended and uploaded. Then the document will now exist as h1, h2, h3 and the newly created h5. h4 will remain stored and be returned if the old version of the document is requested.
 
-The basis of this is taken from a [2014 tech blog from Dropbox](https://blogs.dropbox.com/tech/2014/07/streaming-file-synchronization/)
+The basis of this is taken from a [2014 tech blog from Dropbox](https://blogs.dropbox.com/tech/2014/07/streaming-file-synchronization/).
 
 ##Features
 
@@ -39,6 +39,10 @@ The basis of this is taken from a [2014 tech blog from Dropbox](https://blogs.dr
    + azure - Azure Simple Storage
    + s3 - Amazon s3 storage
 
+##Todo
+
+- Updating a block from the block list
+
 ##Authorization
 
 Authorization is done via a *Authorization* header sent in a request.  Anonymous requests are not allowed.  To authenticate a request, you must sign the request with the shared key when making the request and pass that signature as part of the request.  

blocks/blocks.go

@@ -190,7 +190,8 @@ func BlockBuffer(source io.Reader) (BlockedFile, error) {
 			// Get a 50byte secret to store the file under
 			storeID := strings.ToLower(crypto.RandomSecret(40))
 
-			log.Printf("Saving Hash: %v StoreID: %v", hash, storeID)
+			storeSize := len(storeData)
+			log.Printf("Saving Block: %v Block: %v Store: %v (%.2f%%) StoreID: %v", hash, count, storeSize, ((float64(storeSize) / float64(count)) * 100), storeID)
 
 			// Commit block to repository
 			err = BlockStore.SaveBlock(storeData, storeID)

server/handlers.go

@@ -186,6 +186,12 @@ func BlockAndRespond(w http.ResponseWriter, content io.Reader) {
 
 	blockedFile, err := blocks.BlockBuffer(sourceFile)
 
+	if err != nil {
+		log.Println("Error blocking file: ", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
 	w.WriteHeader(http.StatusCreated)
 	w.Header()["Content-Type"] = []string{"application/json"}
 	body, err := json.Marshal(blockedFile)