Help Center/ Data Security Center/ API Reference/ API Description/ Document Watermarking/ Injecting Watermarks into Documents (Document Addresses)
Updated on 2024-07-29 GMT+08:00

Injecting Watermarks into Documents (Document Addresses)

Function

This API is used to inject visible text watermarks, invisible text watermarks, or visible image watermarks into Word (.docx), PPT (.pptx), Excel (.xlsx), and PDF (.pdf)* documents. You need to pass a document address (currently, only OBS is supported) and watermark information to this API. DSC returns the storage address of the watermarked document.

Calling Method

For details, see Calling APIs.

URI

POST /v1/{project_id}/doc-address/watermark/embed

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID.

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is a token.

Table 3 Request body parameters

Parameter

Mandatory

Type

Description

region_id

Yes

String

ID of the region where the project is located, for example, xx-xx-1.

src_file

Yes

String

Address of the document to which the watermark is to be added. Currently, only OBS objects are supported. The format is obs://bucket/object, where bucket indicates the name of the OBS bucket in the same region as the current project, and object indicates the full path name of the object. For example, obs://hwbucket/hwinfo/hw.png.

doc_type

Yes

String

Type of the document to be watermarked

Enumeration values:

  • WORD

  • EXCEL

  • PDF

  • PPT

dst_file

No

String

Storage address of the watermarked document. The format and requirements are the same as those of the src_file field. If this field is not set, the value of src_file is used by default. In this case, the original file is overwritten after the watermark is added.

blind_watermark

No

String

Content of the invisible text watermark. Either blind_watermark or visible_watermark must be set.

visible_watermark

No

String

Content of the visible text watermark. Either blind_watermark or visible_watermark must be set.

image_mark

No

String

Address of document to be injected with a visible image watermark. The field format must be the same as that of src_file. The image file must be in PNG or JPG format. Otherwise, an error is returned. The image file size cannot exceed 1 MB.

visible_type

No

String

Whether the visible watermark is of the text or image type. If the default value TEXT is used, you need to set visible_watermark to specify a visible text watermark. If this parameter is set to IMAGE, you need to set image_watermark to specify the address of an image watermark. In this case, the visible_watermark, font_size, rotation, and opacity fields will not take effect.

Enumeration values:

  • TEXT

  • IMAGE

file_password

No

String

Password for reading the file to be watermarked, which can contain a maximum of 256 characters. If an Office Word document requires a password for read or domain control, you need to enter the password to open the file.

marked_file_password

No

String

Password for a watermarked document, which can contain a maximum of 256 characters. By default, the document does not have a password.

readonly_password

No

String

Read-only password for a watermarked document, which can contain a maximum of 256 characters. By default, the document does not have a read-only password.

front

No

Integer

Font size of a visible watermark. The value range is [1, 100], and the default value is 50.

rotation

No

Integer

Font angle of a visible watermark, in anticlockwise direction. The value range is [0, 90], and the default value is 45.

opacity

No

Float

Transparency of a visible watermark. The value range is [0, 1], and the default value is 0.3.

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

region_id

String

ID of the region where the current project is located, for example, xx-xx-1.

watermarked_file

String

Address of the document to which the watermark is to be added. Currently, only OBS objects are supported. The format is obs://bucket/object, where bucket indicates the name of the OBS bucket in the same region as the current project, and object indicates the full path name of the object. For example, obs://hwbucket/hwinfo/hw.doc.

Status code: 400

Table 5 Response body parameters

Parameter

Type

Description

error_code

String

Error Code

error_msg

String

Error Message

Example Requests

Embed the invisible watermark "blind_watermark" and visible watermark "visible_watermark" to the Word document at obs://hwbucket/hwinfo/hw.doc.

POST /v1/{project_id}/doc-address/watermark/embed

{
  "region_id" : "xx-xx-1",
  "src_file" : "obs://hwbucket/hwinfo/hw.doc",
  "doc_type" : "WORD",
  "blind_watermark" : "blind_watermark",
  "visible_watermark" : "visible_watermark"
}

Example Responses

Status code: 200

Request succeeded.

{
  "region_id" : "xx-xx-1",
  "watermarked_file" : "obs://hwbucket/hwinfo/hw.docx"
}

Status code: 400

Invalid request.

{
  "error_code" : "DSC.00000007 ",
  "error_msg" : "File format error"
}

SDK Sample Code

The SDK sample code is as follows.

Embed the invisible watermark "blind_watermark" and visible watermark "visible_watermark" to the Word document at obs://hwbucket/hwinfo/hw.doc.

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.dsc.v1.region.DscRegion;
import com.huaweicloud.sdk.dsc.v1.*;
import com.huaweicloud.sdk.dsc.v1.model.*;


public class CreateDocWatermarkByAddressSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");

        ICredential auth = new BasicCredentials()
                .withAk(ak)
                .withSk(sk);

        DscClient client = DscClient.newBuilder()
                .withCredential(auth)
                .withRegion(DscRegion.valueOf("<YOUR REGION>"))
                .build();
        CreateDocWatermarkByAddressRequest request = new CreateDocWatermarkByAddressRequest();
        CreateDocWatermarkByAddressRequestBody body = new CreateDocWatermarkByAddressRequestBody();
        body.withVisibleWatermark("visible_watermark");
        body.withBlindWatermark("blind_watermark");
        body.withDocType(CreateDocWatermarkByAddressRequestBody.DocTypeEnum.fromValue("WORD"));
        body.withSrcFile("obs://hwbucket/hwinfo/hw.doc");
        body.withRegionId("xx-xx-1");
        request.withBody(body);
        try {
            CreateDocWatermarkByAddressResponse response = client.createDocWatermarkByAddress(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

Embed the invisible watermark "blind_watermark" and visible watermark "visible_watermark" to the Word document at obs://hwbucket/hwinfo/hw.doc.

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkdsc.v1.region.dsc_region import DscRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkdsc.v1 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]

    credentials = BasicCredentials(ak, sk)

    client = DscClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(DscRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = CreateDocWatermarkByAddressRequest()
        request.body = CreateDocWatermarkByAddressRequestBody(
            visible_watermark="visible_watermark",
            blind_watermark="blind_watermark",
            doc_type="WORD",
            src_file="obs://hwbucket/hwinfo/hw.doc",
            region_id="xx-xx-1"
        )
        response = client.create_doc_watermark_by_address(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Embed the invisible watermark "blind_watermark" and visible watermark "visible_watermark" to the Word document at obs://hwbucket/hwinfo/hw.doc.

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    dsc "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dsc/v1"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dsc/v1/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dsc/v1/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        Build()

    client := dsc.NewDscClient(
        dsc.DscClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.CreateDocWatermarkByAddressRequest{}
	visibleWatermarkCreateDocWatermarkByAddressRequestBody:= "visible_watermark"
	blindWatermarkCreateDocWatermarkByAddressRequestBody:= "blind_watermark"
	request.Body = &model.CreateDocWatermarkByAddressRequestBody{
		VisibleWatermark: &visibleWatermarkCreateDocWatermarkByAddressRequestBody,
		BlindWatermark: &blindWatermarkCreateDocWatermarkByAddressRequestBody,
		DocType: model.GetCreateDocWatermarkByAddressRequestBodyDocTypeEnum().WORD,
		SrcFile: "obs://hwbucket/hwinfo/hw.doc",
		RegionId: "xx-xx-1",
	}
	response, err := client.CreateDocWatermarkByAddress(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Status Codes

Status Code

Description

200

Request succeeded.

400

Invalid request.

Error Codes

See Error Codes.