Productivity Tools

Published: 2020.06.22

Publish post to WordPress through API

This article describes how to configure Azure Bitnami WordPress instance to be able to publish articles using API. The article describes the process using a clean version of Bitnami WordPress

Clean version fo WordPress allows us to retrieve posts using API with simple get.

$posts=Invoke-RestMethod -Method GET -Uri http://15.236.123.60/wp-json/wp/v2/posts?per_page=100 -ContentType "application/json"  foreach($p in $posts) {     Write-Host $p.title.Rendered     Write-Host $p.content.rendered }

We don’t need to provide any credentials. It is working by default.

Unfortunately, it is not so easy to publish a new post using API. Even if we add authorization information following code will return 401 Unauthorized.

$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("user:9pnCnk4Oij2K"))) $header = @{     Authorization=("Basic {0}" -f $base64AuthInfo) }  $params = @{     title = "NewPost1"     content = "Post published with API"          status = 'publish'     } $params1=$params|ConvertTo-Json  $newPostAddress="http://15.236.180.138/wp-json/wp/v2/posts" #$updatePostAddress="http://15.236.180.138/wp-json/wp/v2/posts/$postid" $response=Invoke-RestMethod -Method post -Uri $newPostAddress -ContentType "application/json"  -Headers $header -Body $params1

First let’s enable simple user:password authorization. Install WordPress REST API Authentication plugin

In plugin configuration chose Basic Authentication and Username:Password option. Save configuration.

Make a backup of file httpd-app

cp /opt/bitnami/apps/wordpress/conf/httpd-app.conf /opt/bitnami/apps/wordpress/conf/httpd-app.conf_bak

Edit httpd-app file (/opt/bitnami/apps/wordpress/conf/httpd-app). Adding the rewrite rule: RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

nano /opt/bitnami/apps/wordpress/conf/httpd-app.conf

I propose to replace the content of your file with the data provided below.

<IfDefine USE_PHP_FPM>     <Proxy "unix:/opt/bitnami/php/var/run/wordpress.sock|fcgi://wordpress-fpm" timeout=300>     </Proxy> </IfDefine>  <Directory "/opt/bitnami/apps/wordpress/htdocs">     Options +MultiViews +FollowSymLinks     AllowOverride None     <IfVersion < 2.3 >         Order allow,deny         Allow from all     </IfVersion>     <IfVersion >= 2.3>         Require all granted     </IfVersion>        <IfDefine USE_PHP_FPM>        <FilesMatch \.php$>          SetHandler "proxy:fcgi://wordpress-fpm"        </FilesMatch>     </IfDefine>      RewriteEngine On    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]    RewriteBase /    RewriteRule ^index\.php$ - [S=2]     # uploaded files    RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]     RewriteCond %{REQUEST_FILENAME} !-f    RewriteCond %{REQUEST_FILENAME} !-d    RewriteRule . index.php [L]      Include "/opt/bitnami/apps/wordpress/conf/banner.conf" </Directory>  Include "/opt/bitnami/apps/wordpress/conf/htaccess.conf"

Restart Apache

sudo /opt/bitnami/ctlscript.sh restart apache

Now you could expect to be able to post data. Unfortunately this at this stage usually it is not working. The missing step is to open the Protected REST APIs tab. You just need to open it to change some internal plugin configuration.

After this, step you can post data with the code provided above.

From now on also if you would like to get information you need to provide user credentials, so code from the beggining should be changed to:

$posts=$null $base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("user:FhIwtEKNCRF7"))) $header = @{    Authorization=("Basic {0}" -f $base64AuthInfo) } $posts=Invoke-RestMethod -Method GET -Uri http://35.180.201.220/wp-json/wp/v2/posts?per_page=100 -ContentType "application/json"  -Headers $header foreach($p in $posts) {    Write-Host $p.title.Rendered    Write-Host $p.content.rendered }