Category: Web Development

Breaking the Internet

Retrieving User Id in Web API 2 Controller – .NET

Hi everyone,

Just a quick post on how to retrieve the current user’s id in a Web API 2 controller:

var userId = RequestContext.Principal.Identity.GetUserId();

Note that you’ll need the following using statements:

using Microsoft.AspNet.Identity;
using System.Web.Http;

Thanks to the following stackoverflow post for the info: https://stackoverflow.com/a/21618056/522859

Git Ignore Template for .NET

Hi everyone,

A sample .gitignore file for if you’re working with .net:

*.cache
*.dll
*.exe
*.pdb
/build/
*.suo
*.user
_ReSharper.*/
*.sdf
*.opensdf
*.tlog
*.log
TestResult.xml
*.VisualState.xml
Version.cs
Version.h
Version.cpp

Also, if you happen to have added some files you didn’t mean to:

git rm –cached file_you_dont_want.pdb
git commit -m “Remove pdb file”

Thanks to these stackoverflow posts for the info:
https://stackoverflow.com/a/8675415/522859
https://stackoverflow.com/a/11629271/522859

Import an Existing Project to BitBucket

Hi everyone,

Today I needed to import an existing project to Bitbucket. The documentation is really good, but just in case you have trouble finding it:

  1. Navigate to the root directory of your project.
  2. Run the following commands in terminal/command prompt:
    git init
    git add –all
    git commit -m “Initial Commit”
  3. Login to Bitbucket and create repository.
  4. Locate the clone URL (left menu) e.g. https://email_address.bitbucket.domain:7999/project_name/repo.git
  5. Upload your files:
    git remote add origin https://email_address.bitbucket.domain:7999/project_name/repo.git
    git push -u origin master

    Check out the following link for more info: https://confluence.atlassian.com/bitbucketserver/importing-code-from-an-existing-project-776640909.html

Unsupported_Grant_Type – MVC Web Api (error)

Hi everyone,

I ran into the following error while attempting to authenticate using .NET Web Api:

POST http://localhost:63720/Token HTTP/1.1
Host: localhost:63720
Content-Type: application/json
Content-Length: 0
HTTP/1.1 400 Bad Request
Content-Type: application/json;charset=UTF-8
Date: Mon, 16 Apr 2018 14:18:06 GMT
Content-Length: 34

{“error”:”unsupported_grant_type”}

This one was pretty straight forward. Ensure that have the correct content-type:

Content-Type: application/x-www-form-urlencoded

And finally, ensure that you provide a grant type in the request body:

grant_type=password&username=test_username&password=test_password

Thanks to the following stackoverflow post for the info: https://stackoverflow.com/a/29261024/522859

FAILED. Reason: Requires capabilities : [CAPABILITY_IAM] – AWS SAM

Hi everyone,

I ran into an error today while trying to deploy using AWS SAM:

aws cloudformation deploy –template-file C:Usersxxxserverless-output.yaml –stack-name events-app
Failed to create the changeset: Waiter ChangeSetCreateComplete failed: Waiter encountered a terminal failure state Status: FAILED. Reason: Requires capabilities : [CAPABILITY_IAM]

The solution is pretty straightforward. You need to explicitly add –capabilities CAPABILITY_IAM to you command:

AttributeError: module ‘serial’ has no attribute ‘SerialException’ – Python 3.5

Hi everyone,

A quick fix for an error I ran into while updating to Pyhton 3.5.2:

AttributeError: module 'serial' has no attribute 'SerialException'

I needed to add pyserial:

pi@raspberrypi:~/Desktop/piscripts/get-commands $ sudo pip3.5 install pyserial
Collecting pyserial
  Downloading pyserial-3.4-py2.py3-none-any.whl (193kB)
    100% |████████████████████████████████| 194kB 530kB/s
Installing collected packages: pyserial
Successfully installed pyserial-3.4

Thanks to the following link: https://stackoverflow.com/a/47562659/522859

AttributeError: ‘dict’ object has no attribute ‘iteritems’ – Python

Hey everyone,

Just running through object detection samples for Tensorflow and I encountered the following error:

Sample: https://github.com/GoogleCloudPlatform/tensorflow-object-detection-example

AttributeError: ‘dict’ object has no attribute ‘iteritems’

The issue seems to be that the sample hasn’t been made compatible with Python 3.x. Simply make the following change and it should work:


# Original
for cls, new_image in new_images.iteritems():

# Changed
for cls, new_image in new_images.items():

Thanks to the following StackOverflow post: https://stackoverflow.com/a/30418498/522859

VirtualDog Tutorial PluralSight

Hey everyone,

Just taking a quick look at Jasmine with Typescript and found a decent looking tutorial on PluralSight with a sample app called VirtualDog. Attempting to run the following command resulted in an error on Windows 10:

npm run bower-typings

> concurrently “bower install” “typings install”

[0] ‘bower’ is not recognized as an internal or external command,
[0] operable program or batch file.
[1] ‘typings’ is not recognized as an internal or external command,
[1] operable program or batch file.
[1] typings install exited with code 1
[0] bower install exited with code 1

npm ERR! Windows_NT 10.0.15063
npm ERR! argv “C:\Program Files\nodejs\node.exe” “C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js” “run” “bower-typings”
npm ERR! node v6.11.3
npm ERR! npm v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! VitrualDog@0.0.1 bower-typings: `concurrently “bower install” “typings install” `
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the VitrualDog@0.0.1 bower-typings script ‘concurrently “bower install” “typings install” ‘.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the VitrualDog package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! concurrently “bower install” “typings install”
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs VitrualDog
npm ERR! Or if that isn’t available, you can get their info via:
npm ERR! npm owner ls VitrualDog
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! C:UsersChris-PCDesktopTesting Javascript with Jasmine and Typescriptvirtualdog-beginnpm-debug.log

In order to fix it, just run the following command:
npm install -g bower

Thanks to the following link: https://stackoverflow.com/a/37669968/522859

Exited with code 9009 – Visual Studio Build

Hey everyone,

I ran into the following error today while attempting to build a solution:

combiner exited with code 9009

It apparently means that a file couldn’t be found. The solution was to simply restart visual studio.

I’d been manually adding them to the directory and this is apparently a common cause. See the following Stackoverflow post for more info: https://stackoverflow.com/a/28198020/522859