This topic describes how to use Content Moderation SDK for .NET to moderate text for spam such as pornographic and terrorist content.
Description
Only synchronous moderation is supported for text anti-spam. For more information about the related parameters, see /green/text/scan.
You can send a request to moderate one or more text entries. You are charged based on the number of text entries that are moderated. For more information, see Billing overview.
Prerequisites
The dependencies for Content Moderation SDK for .NET are installed. For more information about how to install the dependencies, see Installation.
You must use the required .NET version described in the Installation topic to install the dependencies. Otherwise, subsequent operation calls fail.
Moderate text for spam
Text anti-spam allows you to add custom terms, such as the brand terms of competitors. If the moderated text contains the terms that you add, the value of the suggestion parameter is block in the returned machine-assisted moderation result.
You can add terms in the Content Moderation console or by calling an API operation.
Operation | Description | Supported region |
TextScanRequest | Submits text moderation tasks with the scenes parameter set to antispam. |
|
Sample code
using System;
using Newtonsoft.Json;
using Aliyun.Acs.Core;
using Aliyun.Acs.Core.Http;
using Aliyun.Acs.Core.Profile;
using Aliyun.Acs.Green.Model.V20180509;
using System.Collections.Generic;
namespace csharp_sdk_sample
{
class Program
{
static void Main(string[] args)
{
/**
* Common ways to obtain environment variables:
* Obtain the AccessKey ID of your RAM user: Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_ID");
* Obtain the AccessKey secret of your RAM user: Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_SECRET");
*/
DefaultProfile profile = DefaultProfile.GetProfile(
"cn-shanghai",
"We recommend that you obtain the AccessKey ID of your RAM user from environment variables",
"We recommend that you obtain the AccessKey secret of your RAM user from environment variables");
// Note: We recommend that you reuse the instantiated client as much as possible. This improves moderation performance and avoids repeated client connections.
DefaultAcsClient client = new DefaultAcsClient(profile);
TextScanRequest request = new TextScanRequest();
request.AcceptFormat = FormatType.JSON;
request.ContentType = FormatType.JSON;
request.Method = MethodType.POST;
request.Encoding = "UTF-8";
Dictionary<string, object> task1 = new Dictionary<string, object>();
task1.Add("content", "Content of the text to be moderated");
Dictionary<string, object> httpBody = new Dictionary<string, object>();
// Specify the moderation scenario. Set the scenes parameter to antispam.
httpBody.Add("scenes", new List<string> { "antispam" });
httpBody.Add("bizType", "default");
httpBody.Add("tasks", new List<Dictionary<string, object>> { task1 });
request.SetContent(System.Text.Encoding.Default.GetBytes(JsonConvert.SerializeObject(httpBody)), "utf-8", FormatType.JSON);
try
{
TextScanResponse response = client.GetAcsResponse(request);
if (response.HttpResponse.Status != 200)
{
Console.WriteLine("the request failed. status:{0}", response.HttpResponse.Status);
}
Console.WriteLine(System.Text.Encoding.Default.GetString(response.HttpResponse.Content));
}
catch (Exception ex)
{
Console.WriteLine("Failed with error info: {0}", ex.Message);
}
}
}
}Provide feedback on text anti-spam results
If a text anti-spam result does not meet your expectations, you can use TextFeedbackRequest to provide feedback on the machine-assisted moderation result.
The server corrects the text anti-spam result based on your feedback and adds the feedback to a text library. When you submit text that matches the text pattern next time, the system returns the text anti-spam result that is corrected based on your feedback.
Operation | Description | Supported region |
TextFeedbackRequest | Provides feedback on a text anti-spam result to correct the machine-assisted moderation result that does not meet your expectations. |
|
Sample code
using System;
using Newtonsoft.Json;
using Aliyun.Acs.Core;
using Aliyun.Acs.Core.Http;
using Aliyun.Acs.Core.Profile;
using Aliyun.Acs.Green.Model.V20180509;
using System.Collections.Generic;
namespace csharp_sdk_sample
{
class Program
{
static void Main(string[] args)
{
/**
* Common ways to obtain environment variables:
* Obtain the AccessKey ID of your RAM user: Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_ID");
* Obtain the AccessKey secret of your RAM user: Environment.GetEnvironmentVariable("ALIBABA_CLOUD_ACCESS_KEY_SECRET");
*/
DefaultProfile profile = DefaultProfile.GetProfile(
"cn-shanghai",
"We recommend that you obtain the AccessKey ID of your RAM user from environment variables",
"We recommend that you obtain the AccessKey secret of your RAM user from environment variables");
// Note: We recommend that you reuse the instantiated client as much as possible. This improves moderation performance and avoids repeated client connections.
DefaultAcsClient client = new DefaultAcsClient(profile);
TextFeedbackRequest request = new TextFeedbackRequest();
request.AcceptFormat = FormatType.JSON;
request.ContentType = FormatType.JSON;
request.Method = MethodType.POST;
request.Encoding = "UTF-8";
// label: The expected category of moderation results for the moderated text in the specified moderation scenario.
Dictionary<string, object> httpBody = new Dictionary<string, object>();
httpBody.Add("taskId", "ID of the text moderation task");
httpBody.Add("label", "spam");
httpBody.Add("content", "Content of the moderated text");
request.SetContent(System.Text.Encoding.Default.GetBytes(JsonConvert.SerializeObject(httpBody)), "utf-8", FormatType.JSON);
try
{
TextFeedbackResponse response = client.GetAcsResponse(request);
if (response.HttpResponse.Status != 200)
{
Console.WriteLine("the request failed. status:{0}", response.HttpResponse.Status);
}
Console.WriteLine(System.Text.Encoding.Default.GetString(response.HttpResponse.Content));
}
catch (Exception ex)
{
Console.WriteLine("Failed with error info: {0}", ex.Message);
}s
}
}
}