Post Joomla! article

Here is my Example how to post Joomla! article from .NET.

Four steps are needed:

1. Open Joomla! admin page
2. Login to Joomla!
3. Open add article page
4. Save and close

First we will create HttpClient and same instance I will use for every step:

HttpClientHandler httpClientHandler = new HttpClientHandler
{
    CookieContainer = new CookieContainer(),
    UseCookies = true,
    AllowAutoRedirect = true
};
HttpClient client = new HttpClient(httpClientHandler);

For every step we will need token

static string ExtractTokenName(string html)
{
    var regex = new Regex(@"""csrf\.token"":""(?<token>[a-f0-9]{32})""");
    var match = regex.Match(html);

    if (match.Success)
    {
        return match.Groups["token"].Value;
    }

    throw new Exception("CSRF-Token not found.");
}

1. Open Joomla! admin page:

   async Task<string> OpenJoomlaAdminPage(HttpClient httpClient, string url) 
   {
       HttpResponseMessage getResponse = await httpClient.GetAsync(url);
       string html = await getResponse.Content.ReadAsStringAsync();
       return html;
   }
   

2. Login to Joomla!:

   async Task<bool> LoginToJoomla(HttpClient httpClient, string url, string username, string password, string joomlaAdminPagehtml)
   {
       var tokenName = ExtractTokenName(joomlaAdminPagehtml);
       var tokenValue = "1";
       var formContent = new FormUrlEncodedContent([
           new KeyValuePair<string, string>("username", username),
           new KeyValuePair<string, string>("passwd", password),
           new KeyValuePair<string, string>("option", "com_login"),
           new KeyValuePair<string, string>("task", "login"),
           new KeyValuePair<string, string>(tokenName, tokenValue)
       ]);
       HttpResponseMessage postResponse = await httpClient.PostAsync(url, formContent);
       string postResult = await postResponse.Content.ReadAsStringAsync();
       return postResult.Contains("mod_quickicon") || postResult.Contains("cpanel");
   }
   

3. Open add article page:

   async Task<string> OpenAddArticle(HttpClient httpClient, string addArticleUrl)
   {
       HttpResponseMessage createResponse = await httpClient.GetAsync(addArticleUrl);
       string createHtml = await createResponse.Content.ReadAsStringAsync();
       return ExtractTokenName(createHtml);
   }
   

4. Save and close:

    
   async Task<bool> PostArticleToJoomla(HttpClient httpClient, string url, string articleToken, string title, string catid, string articletext)
   {
       var formData = new FormUrlEncodedContent(new[]
       {
           new KeyValuePair<string, string>("jform[title]", title),
           new KeyValuePair<string, string>("jform[catid]", catid),
           new KeyValuePair<string, string>("jform[language]", "*"), 
           new KeyValuePair<string, string>("jform[state]", "1"),
           new KeyValuePair<string, string>("jform[articletext]", articletext),
           new KeyValuePair<string, string>("task", "article.save"),
           new KeyValuePair<string, string>(articleToken, "1")
       });
   
       HttpResponseMessage postResponse = await httpClient.PostAsync(url, formData);
       string postResultHtml = await postResponse.Content.ReadAsStringAsync();
   
       return postResultHtml.Contains("Article saved.");
   }