File conversion

Interactive Whiteboard supports file conversion from PPT, PPTX, DOC, DOCX, and PDF files into static images, as well as from PPT/PPTX files into dynamic HTML web pages. The generated images and web pages can be presented on the whiteboard. See File Conversion Overview.

This page applies to the new version of file conversion. For the main differences between the old and new versions, see Version comparison. If you use the old file conversion, see Old File Conversion RESTful API Reference.

Before calling the RESTful API for file conversion, ensure that you have done the following:

You have enabled Docs to Picture or Docs to Web and configured storage settings in Agora Console. See Enable server-side supporting features.
You have generated a URL address for the file you want to convert, and the address is publicly accessible.

Start file conversion

Call this API to start a file-conversion task.

Prototype

Method: POST
Access point: https://api.netless.link/v5/projector/tasks

Request header

Pass in the following parameters in the request header:

Parameter	Category	Required/Optional	Description
`token`	string	Required	A `writer` or `admin` SDK token. You can obtain a token using one of the following methods: Get an SDK token for testing purposes from Agora Console. See Get security credentials for your whiteboard project. Call the RESTful API. See Generate an SDK token. Write code on your app server. See Generate a token from your app server.
`region`	string	Required	Specifies a data center to process the request: `us-sv`: Silicon Valley, US, which provides services to North America and South America. `sg`: Singapore, which provides services to Singapore, East Asia, and Southeast Asia. `in-mum`: Mumbai, India, which provides services to India. `cn-hz`: Hangzhou, China, which provides services to the areas not covered by other data centers. `eu`: Frankfurt, Europe, which provides services to Europe.

Request Body

The following parameters are required in the URL:

Parameter	Category	Required/Optional	Description
`resource`	string	Required	The URL of the file you want to convert.
`type`	string	Required	The conversion type: `dynamic`: Dynamic-file conversion, converting the file to web pages. `static`: Static-file conversion, converting the file to images.
`preview`	boolean	Optional	Whether to generate a preview of the generated files: `true`: Generate a preview. `false`: Do not generate a preview.
`scale`	number	Optional	The scale factor of an image. The range is [0.1,3.0], and the default value is `1.2`. The higher the value, the clearer the generated image. This parameter only takes effect when `type` is set to `static`.
`outputFormat`	string	Optional	The format of the generated image: `png` `jpg` `jpeg` The default value is `png`. This parameter only takes effect when `type` is set to `static`.
`webhookEndpoint`	string	Optional	The address of the Webhook callback, generally the app server address, is used to receive information sent by the server, such as the progress of tasks. See webhook callback.
`webhookRetry`	number	Optional	The number of retries the system attempts when the Webhook callback fails. The default value is `3`, and the maximum is `10`.
`imageCompressionLevel`	number	Optional	The compression level of the output image. You can only pass in the following values: `0`: (Default) Output the original image. `1`: The maximum number of colors used in the output image is limited to 256. `2`: The maximum number of colors used in the output image is limited to 192. `3`: The maximum number of colors used in the output image is limited to 128. `4`: The maximum number of colors used in the output image is limited to 64. This parameter only takes effect when `type` is set to `dynamic`. Usually, the size of the output image can be compressed to up to 10% of its original without significantly reducing the image quality. Compressing the size of images can improve the first loading time of PPT files after conversion in poor network environment.

Request example

POST /v5/projector/tasks
Host: api.netless.link
region: cn-hz
Content-Type: application/json
token: NETLESSSDK_YWs9QxxxxxxMjRi
 
{
    "resource": "https://docs-test-xx.oss-cn-hangzhou.aliyuncs.com/xxx",
    "type": dynamic
    "preview": true,
    "webhookEndpoint": "https://example.com/agoracallback",
    "webhookRetry": 1
}

HTTP response

For the details of all the possible response status codes, see the status code table.

If the status code is 201, the request is successful. The response returns the status code and corresponding parameters.

The following is a response example for a successful request:

{
    "uuid": "2fd2dxxxxx367e",
    "status": "Waiting"
}

Description of parameters in the response:

Parameter	Category	Description
`uuid`	string	The task UUID, which is the unique identifier of the file-conversion task.
`status`	string	The status of the file-conversion task: `Waiting`: Conversion is `waiting` to start. `Converting`: Conversion is in progress. `Finished`: Conversion has `finished`. `Fail`: Conversion failed.

If the status code is not 201, the request fails. The response body includes a message field that describes the reason for the failure.

Query the progress of a file-conversion task

Call this API to query the progress of a file-conversion task.

Prototype

Method: GET
Access point: https://api.netless.link/v5/projector/tasks/{uuid}

Request header

Pass in the following parameters in the request header:

Parameter	Category	Required/Optional	Description
`token`	string	Required	The Task token. You can obtain a token using one of the following methods: Call the RESTful API. See Generate a task token. Write code on your app server. See Generate a token from your app server.
`region`	string	Required	Specifies a data center to process the request: `us-sv`: Silicon Valley, US, which provides services to North America and South America. `sg`: Singapore, which provides services to Singapore, East Asia, and Southeast Asia. `in-mum`: Mumbai, India, which provides services to India. `eu`: Frankfurt, Europe, which provides services to Europe. `cn-hz`: Hangzhou, China, which provides services to the areas not covered by other data centers.

Request Path

The following parameters are required in the URL:

Parameter	Category	Required/Optional	Description
`uuid`	string	Required	The task UUID, which is the unique identifier of the file-conversion task. You can get it by calling the RESTful API to start a file conversion.

Request example

GET /v5/projector/tasks/2fxxxxxx367e
Host: api.netless.link
region: cn-hz
Content-Type: application/json
token: NETLESSSDK_YWsxxxxxM2MjRi

HTTP response

For the details of all the possible response status codes, see the status code table.

If the status code is 200, the request is successful. The response returns the status code and corresponding parameters.

The following is a response example for a successful request:

{
    "uuid": "2fdxxxx7e",
    "status": "Finished",
    "type": "dynamic",
    "convertedPercentage": 100,
    "prefix": "https://xxxx.com/dynamicConvert"
    "pageCount": 10,
    "previews": {
      "1": "https://xxxx.xx.xx/1.png",
      "2": "https://xxxx.xx.xx/2.png",
      ...
    }
    "note": "https://xxx.xx.xx/note.json"，
    "images": {
      "1": "https://xxxx.xx.xx/1.xxx",
      "2": "https://xxxx.xx.xx/2.xxx",
    },
    "errorCode": "20xxxxx",
    "errorMessage": "xxx", 
}

Description of parameters in the response:

Parameter	Category	Description
`uuid`	string	The task UUID, which is the unique identifier of the file-conversion task.
`status`	string	The status of the conversion task: `Waiting`: Conversion is `waiting` to start. `Converting`: Conversion is in progress. `Finished`: Conversion has `finished`. `Fail`: Conversion failed.
`type`	string	The conversion type: `dynamic`: Dynamic-file conversion, converting the file to web pages. `static`: Static-file conversion, converting the file to images.
`convertedPercentage`	number	The progress of the conversion expressed as a percentage.
`prefix`	string	The prefix of the address of the generated file.
`pageCount`	number	The number of file pages. This value is not available when the conversion task fails.
`previews`	object	The address of the preview. Each page corresponds to a preview address. This parameter is only returned when `preview` is set to `true` and `type` is set to `dynamic` in the request body when starting the file conversion. This value is not available when the conversion task fails.
`note`	string	Notes and comments extracted from the file. This parameter contains only the pages that have notes or comments.
`images`	object	The address of the static conversion results. Each page corresponds to an image. This parameter is only returned when `type` is set to `static` in the request body when starting the file conversion. This value is not available when the conversion task fails.
`errorCode`	string	The error code. This parameter is only returned when the conversion task fails. For the details of all the possible error codes, see error code.
`errorMessage`	string	The error message corresponding to the error code, describing the cause of the error. This parameter is only returned when the conversion task fails.

Note: The API for querying the progress of file conversion tasks only supports tasks created within the past seven days. To prevent the loss of status information or results, Agora recommends that you additionally store task information after completing or failing a conversion, or receive notifications of task status changes through webhook callbacks.

Query to-be-converted tasks

Call this API to list all tasks that are waiting to be converted.

Prototype

Method: GET
Access point: https://api.netless.link/v5/projector/tasks

Request header

Pass in the following parameters in the request header:

Parameter	Category	Required/Optional	Description
`token`	string	Required	A `writer` or `admin` SDK token. You can obtain a token using one of the following methods: Get an SDK token for testing purposes from Agora Console. See Get security credentials for your whiteboard project. Call the RESTful API. See Generate an SDK token. Write code on your app server. See Generate a token from your app server.
`region`	string	Required	Specifies a data center to process the request: `us-sv`: Silicon Valley, US, which provides services to North America and South America. `sg`: Singapore, which provides services to Singapore, East Asia, and Southeast Asia. `in-mum`: Mumbai, India, which provides services to India. `cn-hz`: Hangzhou, China, which provides services to the areas not covered by other data centers. `eu`: Frankfurt, Europe, which provides services to Europe.

Request example

GET /v5/projector/tasks
Host: api.netless.link
region: cn-hz
Content-Type: application/json
token: NETLESSSDK_YWs9QxxxxxxMjRi

HTTP response

For the details of all the possible response status codes, see the status code table.

If the status code is 200, the request is successful. The response returns the status code and corresponding parameters.

The following is a response example for a successful request:

[
    {
      taskId: 'xxx', 
      status: 1 
    },
    {
       ....
    }
]

Description of parameters in the response:

Parameter	Category	Description
`taskId`	string	The task UUID, which is the unique identifier of the file-conversion task.
`status`	number	The status of the conversion task: `1`: In progress. `0`: Waiting to be converted.

If the status code is not 200, the request fails. The response body includes a message field that describes the reason for the failure.

Cancel conversion task

Call this API to cancel a specified conversion task.

Prototype

Method: DELETE
Access point: https://api.netless.link/v5/projector/tasks/{uuid}

Request header

Pass in the following parameters in the request header:

Parameter	Category	Required/Optional	Description
`token`	string	Required	An SDK token. You can obtain a token using one of the following methods: Call the RESTful API. See Generate an SDK token. Write code on your app server. See Generate a token from your app server.
`region`	string	Required	Specifies a data center to process the request: `us-sv`: Silicon Valley, US, which provides services to North America and South America. `sg`: Singapore, which provides services to Singapore, East Asia, and Southeast Asia. `in-mum`: Mumbai, India, which provides services to India. `eu`: Frankfurt, Europe, which provides services to Europe. `cn-hz`: Hangzhou, China, which provides services to the areas not covered by other data centers.

Request Path

The following parameters are required in the URL:

Parameter	Category	Required/Optional	Description
`uuid`	string	Required	The task UUID, which is the unique identifier of the file-conversion task. You can get it by calling the RESTful API to start a file conversion.

Request example

DELETE /v5/projector/tasks/2fxxxxxx367e
Host: api.netless.link
region: cn-hz
Content-Type: application/json
token: NETLESSSDK_YWsxxxxxM2MjRi

HTTP response

For the details of all the possible response status codes, see the status code table.

If the status code is 200, the request is successful. The response returns the status code and corresponding parameters.

The following is a response example for a successful request:

{
  taskId: 'xxx',
  success: true
}

Description of parameters in the response:

Parameter	Category	Description
`taskId`	string	The task UUID, which is the unique identifier of the file-conversion task.
`success`	boolean	Whether canceling the conversion task is successful: `true`: Task cancellation is successful. `false`: Task cancellation is unsuccessful.

If the status code is not 200, the request fails. The response body includes a message field that describes the reason for the failure.

Set task priority

Call this API to move the specified conversion task in the waiting list to the front or the back of the task queue.

Prototype

Method: PUT
Access point: https://api.netless.link/v5/projector/tasks/{uuid}/priority

Request header

Pass in the following parameters in the request header:

Parameter	Category	Required/Optional	Description
`token`	string	Required	A `writer` or `admin` SDK token. You can obtain a token using one of the following methods:: Get an SDK token for testing purposes from Agora Console. See Get security credentials for your whiteboard project. Call the RESTful API. See Generate an SDK token. Write code on your app server. See Generate a token from your app server.
`region`	string	Required	Specifies a data center to process the request: `us-sv`: Silicon Valley, US, which provides services to North America and South America. `sg`: Singapore, which provides services to Singapore, East Asia, and Southeast Asia. `in-mum`: Mumbai, India, which provides services to India. `eu`: Frankfurt, Europe, which provides services to Europe. `cn-hz`: Hangzhou, China, which provides services to the areas not covered by other data centers.

Request Body

The following parameters are required in the URL.

Parameter	Category	Required/Optional	Description
`priority`	string	Required	Set task priority: `highest`: Move to the front of the task queue. `lowest`: Move to the back of the task queue.

Request Path

The following parameters are required in the URL:

Parameter	Category	Required/Optional	Description
`uuid`	string	Required	The task UUID, which is the unique identifier of the file-conversion task. You can get it by calling the RESTful API to start a file conversion.

Request example

PUT /v5/projector/tasks/2fxxxxxx367e
Host: api.netless.link
region: cn-hz
Content-Type: application/json
token: NETLESSSDK_YWs9QxxxxxxMjRi
{
    "priority": highest
}

HTTP response

For the details of all the possible response status codes, see the status code table.

If the status code is 200, the request is successful. The response returns the status code and corresponding parameters.

The following is a response example for a successful request:

{
  uuid: 'xxx',
  success: true 
}

Description of parameters in the response:

Parameter	Category	Description
`uuid`	string	The task UUID, which is the unique identifier of the file-conversion task.
`success`	boolean	Whether setting the priority is successful: `true`: Setting the priority succeeded. `false`: Setting the priority failed.

If the status code is not 200, the request fails. The response body includes a message field that describes the reason for the failure.

Webhook callback

Call this callback to receive reports on the progress and operating status of file-conversion tasks from the server. You can call this callback by passing in the relevant parameters in the request body when launching a file-conversion task.

The Webhook callback could be repeated multiple times. To ensure that the app server processes identical responses in the same manner, you need to apply idempotent processing.

HTTP response

For the details of all the possible response status codes, see the status code table.

If the status code is 200, the request is successful. The response returns the status code and corresponding parameters.

The following is a response example for a successful request:

{
  code: 0 ,
  message: "success", 
  data: {
      "taskId": "da4c1b9ae************92af4ef22b8", 
      "taskType": "dynamic_conversion", 
      "prefixUrl": "https://xxxx.com/dynamicConvert", 
      "pageCount": 10, 
      "previews": {
        "1": "https://xxxx.xx.xx/1.png",
        "2": "https://xxxx.xx.xx/2.png"
        ...
      }, 
      "note": "https://xxx.xx.xx/note.json"，
      "images": {
        "1": "https://xxxx.xx.xx/1.xxx",
        "2": "https://xxxx.xx.xx/2.xxx",
      },
      "noticeTimestamp": 1231369699739
  }
}

Description of parameters in the response:

Parameter	Category	Description
`code`	number	The error code. When the task succeeds, the value is `0`. For the details of all the possible error codes, see error code.
`message`	string	The error message corresponding to the error code, describing the cause of the error.
`taskId`	string	The task UUID, which is the unique identifier of the file-conversion task.
`taskType`	string	The type of the conversion task. Currently, only `dynamic_conversion` is available.
`prefixUrl`	string	The prefix of the address of the generated file.
`pageCount`	number	The number of file pages. This parameter is not available when the conversion task fails.
`previews`	object	The address of the preview. Each page corresponds to a preview address. This parameter is only returned when `preview` is set to `true` in the request body when starting the file conversion. This parameter is not available when the conversion task fails.
`note`	string	Notes and comments extracted from the file. This parameter contains only the pages that have notes or comments.
`images`	object	The address of the static conversion results. Each page corresponds to a picture. This parameter is only returned when `type` is set to `static` in the request body when starting the file conversion. This value is not available when the conversion task fails.
`noticeTimestamp`	number	The time when you receive the Webhook callback.

Error code

The following are details and solutions for all the possible error codes that could occur when calling the file conversion RESTful API.

Error code	Error message	Solution
2010201	unsupported file format	Upload the PPT or PPTX files.
2010202	dynamic conversion only support pptx	Upload the PPTX files.
2010203	the number of tasks exceeds limit	Call Cancel conversion task to reduce the number of tasks in the queue, or wait for existing conversion tasks to complete before starting a conversion task.
2010605	task not found	Check whether the task UUID is correct.
2011201	task timeout	Check the network connection or compress the file size.
2010606	team not found	Check whether the token is correct. In Agora Console, check whether the data center is correctly configured and docs-to-web is enabled.
2010607	modify priority for running task is not allowed	Ensure that the target task is in the waiting list.
2011301	task not found	Check whether the task UUID is correct.
2030100	download from OSS file failed	Check whether the target file has been uploaded.
2030101	unzip file failed, unsupported file in PPT	Check whether the file can be opened with PowerPoint.
2030102	can't find media file from unzip PPT	Check whether the path of the media files in the PPT is correct and whether an external link is used. On the user's computer, move the PPT file to other folders and check whether the media files in the PPT file are playable.
2030200	read xml file failed	Check whether the uploaded file is edited with software other than MS PowerPoint.
2030201	formula resolve failed, please check animation of PPT	Examine or delete the animation in the PPT, and retry.
2030202	unsupported formula type, please check animation of PPT	Examine or delete the animation in the PPT, and retry.
2040005	task timeout	Abnormal or oversized images are used in the uploaded file; contact support@agora.io
2050099	unknown error	Check whether the uploaded file is edited with software other than MS PowerPoint.
2050100	unsupported file type	Upload the PPT or PPTX files.
2050101	file download failed	Check the network connection.
2050102	file is empty	Open the file locally, and check whether the file is empty.
2050107	file url encode failed	Check whether the URL address of the file is correct.
2050201	init presentation parser failed	Check whether the uploaded file is edited with software other than MS PowerPoint.
2050299	unknown parsing error	Check whether the uploaded file is edited with software other than MS PowerPoint.
2050401	generate preview failed	Check whether the uploaded file is edited with software other than MS PowerPoint.
2060402	fonts in the rules that are not provided	Contact support@agora.io
2090304	upload file to custom storage failed	Check whether the storage configuration is correct.
2090305	not supported storage provider	Check whether the link to the cloud storage service provider is correct, or consider changing the service provider.
2110099	unknown error	Check whether the uploaded file is edited with software other than MS PowerPoint.
2110100	unsupported file type	Upload files in a format that static conversion supports (PPT/PPTX/DOC/DOCX/PDF).
2110101	download file failed	Check whether the address of the file is valid.
2110102	file is empty	Open the file locally, and check whether the file is empty.
2110107	file url encode failed	Check whether the URL address of the file is correct.
2110108	get file extension failed	Check whether the extension of the uploaded file has been modified intentionally, but the content of the file remains in an unsupported format.
2110201	init presentation parser failed	Check whether the uploaded file is edited with software other than MS PowerPoint.
2110202	init word parser failed	Check whether the uploaded file is edited with software other than MS Word.
2120201	file is empty	Open the file locally, and check whether the file is empty.
2120301	download file failed	Check whether the address of the file is valid.