Skip to main content

Getting Started With Google Api client - Golang

google client api
google client apis


Almost every google api i have integreated with my golang projects have same step.
1. Authroize the user
2. Get the token for user
3. Get the cilent using the token
4. Make furter requset for google api using the client


Google api client for golang can be get here

here is the example code

end of example code


Now lets inspect the code what it does.


Start from main function where the program starts the exection


  1. [line 94] Main function starts
  2. [line 96] We are reading the client_id.json file downloaded from the google cloud. It will have information like client_id , project_id, token_id, etc. If you don't have client_id.json create a new one.
  3. [line 103] We are reading the json file and adding the permission we want for app on using the ConfigFromJson fucntion. 
  4. [line 107] We are getting the http client for the further google api requests using the getClient function.
    1. Here This function calls subfunctions
    2. [line 24] tokenCacheFile function trys to load the cache the file already stored in local system.
    3. [line 28] tokenFromFile trys to load the token from the cache file.
    4. [line 30] If  tokenFromfile  function don't get the token from the cache file. Then getTokenFromWeb function uses the token_uri to get the new token and stores it in the cache.
    5. We get the oauth http client with the token for further request to api.
  5. Once we get the client we can use it for any google api for request.
    1. Here i have used the client for the sheets api.
    2. I have also used the same code for the google drive api.
  6. If you want to use client for sheets api
    1. shtsrv, _ := sheets.New(client)
      1. here shtsrv serves as a google sheet api handle
    2. drvsrv, _:= drive.New(client)
      1. drvsrv server as api handle for google drive api

Hope you find it usefull

Comments

Popular posts from this blog

Apache : setup basic auth with apache in windows

Authentication is any process by which you verify that someone is who they claim they are. Authorization is any process by which someone is allowed to be where they want to go or to have information that they want to have. I will show here how to set up basic auth on the apache with windows. Pre-requests  Windows VPS Apache server ( That's it ) ( In windows it might be difficult to setup the Apache alone. So instead use something ling xampp , wamp or laragon .) RestClient (  I personally use the postman , but you can use your preferable client)  Windows VPS provider Steps  Enable the necessary modules in the Apache Create the password file Set the auth directives in the virtual host file. Verify basic auth. Enable the  necessary   modules  in the Apache Open the httpd.conf file in the apache's conf folder. httpd.conf file Enable the necessary modules to make the basic auth working. Necessary modules  mod_auth_basic

Firebase - update a spacific fields of single element of object of array in firestore

Firebase - update a spacific fields of single element of object of array in firestore  Its actully advisable to use map instead of array when ever it is possible. But, there are cetain cases where you don't have option to do so.  For example, you are directly saving the response from some outer source without any modification and they send you an array. In this case you will have array to work with. Firestore does not support array here is why  "bad things can happen if you have multiple clients all trying to update or delete array elements at specific indexes. In the past, Cloud Firestore addressed these issues by limiting what you can do with arrays " For more details information you can refer to Kato Richardson post Best Practices: Arrays in Firebase .  Firestore document having array [ used from stackoverflow question ] Suppose you have array of object something like shown in array. Now you want to update endTime field of the object on the index [1]

Sciter : GUI Application with Golang using HTML/CSS

GUI library for golang sciter This is the words from Sciter's Web site, Sciter brings a stack of web technologies to desktop UI development. Web designers and developers can reuse their experience and expertise in creating modern looking desktop applications. Various GUI frameworks offer different UI declaration and styling languages, such as QML and  XAML (Microsoft WPF) . On the contrary, Sciter allows using time proven, robust, and flexible HTML and CSS for GUI definition and GPU accelerated rendering.   Before using sciter I already tried other alternatives but none of them was satisfactory as an example first i tried andlabs / ui  library   i already have written a post on it. You can read it on post gui programming with golang .  But this library is still under construction and has no support for production apps. Secondly, I go for electron but the problem was my simple calc like the app was of size 150mb. Which is 15mb of go and other was the e