Custom File Format Module

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Use this module to add support of new custom file formats. Crowdin delegates source file parsing to an app that has a custom file format module. When translations are completed, Crowdin passes a source file and a string array with translations to the Custom file format app for translation files generation.

Access

You can grant access to this module to one of the following user categories:

For Crowdin:

Only me (i.e., project owner)
All project members
Selected users

For Crowdin Enterprise:

Only organization admins
All users in the organization projects
Selected users

Structure

{
  "modules": {
    "custom-file-format": [
      {
        "key": "your-module-key-type-xyz",
        "type": "type-xyz",
        "url": "/process",
        "multilingual": true,
        "customSrxSupported": true,
        "signaturePatterns": {
          "fileName": "^.+\\.xyz$",
          "fileContent": "<properties>\\s*<property\\s+name=.*value=.*/>"
        }
      }
    ]
  }
}

Properties

`key`	Type: `string` Required: yes Description: Module identifier within the Crowdin app.
`type`	Type: `string` Required: yes Description: The custom file format identifier. Can be used in API to force the processing of the files by the Custom file format app. If the `type` parameter is used in API, the `signaturePatterns` will be ignored. Values defined via this property can also be referenced by other modules, for example through `attributes.crowdinType` in the File Post-Import Processing module.
`url`	Type: `string` Required: yes Description: The relative URL triggered on file import, update, translation upload, and export.
`multilingual`	Type: `bool` Required: no Allowed values: `true`, `false`. Default is `false` Description: This parameter is used to combine the content of multiple languages into one request when uploading and downloading translations in your Crowdin project.
`customSrxSupported`	Type: `bool` Required: no Allowed values: `true`, `false`. Default is `false` Description: Defines whether the app supports custom segmentation rules (SRX 2.0) for its file format. When enabled, segmentation rules can be defined for the files processed by this module, and Crowdin passes them to the app in the `customSrxContents` parameter. See Content Segmentation.
`signaturePatterns`	Type: `object` Description: Contains `fileName` and/or `fileContent` regular expressions used to detect file type when uploading a new source file via UI (or via API without specified `type` parameter). If the file matches regular expressions, it’s labeled as a custom format file. `fileContent` regular expression checks only the first 64 KB of the file content.

Communication between Custom File Format App and Crowdin

On the initial file import, Crowdin detects custom file format using the signaturePatterns or type parameters and makes an HTTP request to the app’s URL ($baseUrl . $url) for further processing. The app then processes the file and responds to Crowdin. The requests and responses to and from the custom file format apps have two-minute timeouts. The maximum request and response payload size is limited to 5 MB.

Request to the App

Request payload example:

// max request payload - 5 MB
// wait timeout - 2 minutes
{
  "jobType": "parse-file | build-file",
  "organization": {
    "id": 1,
    "domain": "{domain}",
    "baseUrl": "https://{domain}.crowdin.com",
    "apiBaseUrl": "https://{domain}.api.crowdin.com"
  },
  "project": {
    "id": 1,
    "identifier": "your-project-identifier",
    "name": "Your Project Name"
  },
  "file": {
    "id": 1,
    "name": "file.xml",
    "content": "VGhpcyBpcyBmaWxlIGNvbnRlbnQ=", // base64 encoded source file content
    "contentUrl": "https://crowdin-tmp.downloads.crowdin.com/1/file.xml?aws-signature=..." // source file public URL
  },
  "sourceLanguage": {
    "id": "es",
    "name": "Spanish",
    "editorCode": "es",
    "twoLettersCode": "es",
    "threeLettersCode": "spa",
    "locale": "es-ES",
    "androidCode": "es-rES",
    "osxCode": "es.lproj",
    "osxLocale": "es",
    "pluralCategoryNames": ["one"],
    "pluralRules": "(n != 1)"
  },
  "targetLanguages": [
    {
      // same structure as for sourceLanguage, empty when uploading a new source file, one element for import_translations & export, can be more for multilingual files
    }
  ],
  "strings": [...], // for the build-file jobs, array of segments
  "stringsUrl": "https://tmp.downloads.crowdin.com/strings.ndjson", // for the build-file jobs, file with segments, in new-line delimited json format
  "customSrxContents": "<?xml version=\"1.0\" encoding=\"UTF-8\"?>..." // segmentation rules defined for the file, null if there are none
}

Properties:

`jobType`	Type: `string` Possible values: `parse-file`, `build-file` Description: Specifies the action that should be executed by the app. `parse-file` job is used for initial source file upload, source file update, and translation upload. For `parse-file` jobs, Crowdin passes a source file to the app and expects a parsed source string array in the response. `build-file` job is used for translation download. For `build-file` jobs, Crowdin passes a source file and a string array with translations to the app and expects a generated translation file in the response.
`file.content`, `file.contentUrl`	Type: `string` Description: Parameters used to pass the base64 encoded source file content (`file.content`) or a source file public URL (`file.contentUrl`). Either of these two parameters can be used. Maximum request payload limit is 5 MB.
`strings`, `stringsUrl`	Type(strings): `array` Type(stringsUrl): `string` Description: Parameters used for translations download (for `build-file` job type only). `strings` - translation strings array. `stringsUrl` - public URL to a new-line delimited json with translation strings. Either of these two parameters can be used. Maximum request payload limit is 5 MB.
`customSrxContents`	Type: `string` Description: Content of the SRX 2.0 segmentation rules file defined for the source file. Passed for both `parse-file` and `build-file` jobs when the module has the `customSrxSupported` property enabled. If no segmentation rules are defined for the file, the parameter is `null`. See Content Segmentation.

Expected Response from the App for the parse-file Job Type

Response payload example:

// max response payload - 5 MB
// wait timeout - 2 minutes
{
  "data": {
    "strings": [...], // segments array
    "stringsUrl": "https://app.example.com/jKe8ujs7a-segments.ndjson", // new-line delimited json file with parsed strings
    "preview": "VGhpbmdzIGFyZSBvbmx5IGltcG9zc2libGUgdW50aWwgdGhleSdyZSBub3Qu", // optional, base64 encoded content of preview html file, not supported if there are plural strings
    "previewUrl": "https://app.example.com/LN3km2K6M-preview.html", // optional, URL of preview html file, not supported if there are plural strings
  },
  "error": {
    "message": "Your error message"
  }
}

Properties:

data.strings, data.stringsUrl

Type(data.strings): array

Type(data.stringsUrl): string

Description: Parameters used to pass the parsed strings content.
data.strings - parsed strings array.
data.stringsUrl - public URL to a new-line delimited json with parsed strings.
Either of these two parameters can be used.

data.preview, data.previewUrl

Type(data.preview): string

Type(data.previewUrl): string

Description: Parameters used to pass the optional HTML preview of the parsed strings content, which can be generated by the app. The generated HTML preview will be displayed in the Editor. See the HTML Preview file example.

error.message

Type: string

Description: An error message that can be passed from the app to Crowdin and will be visible to a user in the UI.

Expected Response from the App for the build-file Job Type

Response payload example:

// max response payload - 5 MB
// wait timeout - 2 minutes
{
  "data": {
    "content": "TWF5IHRoZSBGb3JjZSBiZSB3aXRoIHlvdS4=", // base64 encoded translation file content
    "contentUrl": "https://app.example.com/p5uLEpq8p-result.xml", // translation file public URL
  },
  "error": {
    "message": "Your error message"
  }
}

Properties:

data.content, data.contentUrl

Type(data.content): string

Type(data.contentUrl): string

Description: Parameters used to pass the base64 encoded translation file content (data.content) or a translation file public URL (data.contentUrl).
Either of these two parameters can be used.

error.message

Type: string

Description: An error message that can be passed from the app to Crowdin and will be visible to a user in the UI.

Strings Array Structure

Below you can see an example of the strings structure expected from the app for parse-file job type and passed to the app for build-file job type.

Payload example:

// strings should be in "new-line delimited json" format if they passed by URL
[
  { // non plural string
    "previewId": 1, // only for "parse-file" jobType, required when the HTML preview of the file is generated
    "id": 1, // only for "build-file" jobType
    "identifier": "string-key-1", // required
    "context": "Some context", // optional
    "customData": "max 4 KB of custom data", // optional
    "maxLength": 10, // optional, default null
    "isHidden": false, // optional, default null
    "hasPlurals": false, // optional, default false
    "labels": ["label-one", "label-two"], // optional, default []
    "attributes": { // optional
      "crowdinType": "html" // the string content is re-parsed with the HTML parser
    },
    "text": "String source text", // required
    "translations": { // optional
      "uk": { // targetLanguage.id
        "text": "Переклад стрічки", // required
        "status": "untranslated | translated | approved" // optional, default "translated"
      },
      // can be other languages for multilingual, check "targetLanguages" in the request payload
    }
  },
  { // plural string
    "previewId": 2,
    "id": 2,
    "identifier": "string-key-2",
    "context": "Some optional context",
    "customData": "max 4 KB of custom data",
    "maxLength": 15,
    "isHidden": false,
    "hasPlurals": true,
    "labels": [],
    "text": { // keys from sourceLanguage.pluralCategoryNames
      "one": "One file",
      "other": "%d files",
    },
    "translations": {
      "uk": {
        "text": { // keys from targetLanguage.pluralCategoryNames
          "one": "One file",
          "few": "%d файла",
          "many": "%d файлів",
        },
        "status": {
          "one": "untranslated",
          "few": "translated",
          "many": "approved",
        }
      }
    }
  }
]

Properties:

`previewId`	Type: `string` or `number` Required: yes (only for the `parse-file` job when the HTML preview of the file is generated) Description: Unique identifier that links the string to its element in the HTML Preview file. Its value must exactly match the `{previewId}` token used in the corresponding element’s `id=“string_preview_id_{previewId}”` (see HTML Preview of the File). Used for `parse-file` job type only.
`id`	Type: `integer` Description: Numeric identifier of the string in your Crowdin project. Used for `build-file` job type only.
`identifier`	Type: `string` Description: Unique string key within the file.
`customData`	Type: `string` Description: Any custom data that needs to be linked to the string. Added custom data will be exported along the corresponding strings on translation export.
`attributes.crowdinType`	Type: `string` Allowed values: Mostly match the `type` values accepted by the Add File API method, excluding the following: `auto`, `xml`, `csv`, `docx`, `xlsx`, `dita`, `idml`, `mif`, `svg`. Additionally, custom values defined via the `type` property of this module are also supported. Description: Used to specify the file format type for a string when post-processing is needed. For example, if a string returned by the app contains embedded HTML, setting `crowdinType` to `html` allows to re-parse the string using the HTML parser. Crowdin parses and segments such content the same way as a file of that format, and merges the translations back into the original string when generating the translation file. Used for `parse-file` job type only. See Content Segmentation.

Content Segmentation

The content of a custom file format can be split into smaller segments in two ways: your app segments the content itself with the rules that Crowdin passes to it, or Crowdin segments the content with one of its own parsers. Segment it in the app when only your app can parse the content, and leave it to a Crowdin parser when a string contains content in a format that Crowdin already supports, such as HTML or Markdown.

Segmenting Content in Your App

Set the customSrxSupported property to true in the module configuration. Segmentation rules (SRX 2.0) can then be set for the files processed by this module, for example via the importOptions.srxStorageId parameter of the Add File and Update File API methods.

Crowdin passes the content of the rules defined for a file in the customSrxContents parameter of both parse-file and build-file requests. The app does the segmentation itself:

For the parse-file job, the app splits the text by those rules and returns each segment as a separate string with its own identifier (and its own previewId if the app generates the HTML preview of the file).
For the build-file job, the app receives those segments with their translations and joins them back when generating the translation file.

If no rules are defined for a file, customSrxContents is null.

Translation upload uses the parse-file job as well, so return the same per-segment identifiers when parsing a translation file. Otherwise the uploaded translations won’t match the existing segments.

Segmenting Content with a Crowdin Parser

Set the attributes.crowdinType attribute of a string to the format of its content. Crowdin then parses such a string the same way as a file of that format, so the content is segmented by the project’s settings for that format, or by that format’s default segmentation.

Each segment becomes a separate string in the project. For the build-file job, Crowdin merges the translations back into the original string, so the app receives the same string it returned during file parsing.

Strings with plurals aren’t re-parsed, and in string-based projects the attribute has no effect.

HTML Preview of the File

The HTML preview renders a WYSIWYG view of the file in the Editor. Wrap each translatable string in an element that carries both of the following:

id="string_preview_id_{previewId}", where {previewId} matches the previewId of the corresponding string from the parse-file response. Use double quotes and make the value match exactly.
class="crowdin_phrase", so the Editor can highlight the string in the preview and edit it inline. Without this class, the string is highlighted only when selected from the strings list, and inline editing in the preview doesn’t work.

If the app splits a string into several segments, give each segment its own previewId and element in the preview. If several segments share a previewId, only the last one is linked to the element.

The HTML preview is generated only during source file import. It’s not produced when uploading translations (including multilingual uploads), and it’s not displayed when the app passes strings with plurals.

HTML Preview of the file example:

<html lang="en">
  <head>
    <title>Optional Title</title>
    <style>
      table, th, td {
        border: 1px solid #aaa;
      }
    </style>
  </head>
  <body>
    <h1 style="text-align: center">HTML preview of the file</h1>
    <table style="width: 100%">
      <tr>
        <th>Key:</th>
        <th>Text:</th>
      </tr>
      <tr>
        <td>Key 1</td>
        <td><span id="string_preview_id_1" class="crowdin_phrase">Source Text 1</span></td> <!-- 1 is previewId in strings json -->
      </tr>
      <tr>
        <td>Key 2</td>
        <td><span id="string_preview_id_2" class="crowdin_phrase">Source Text 2</span></td> <!-- 2 is previewId in strings json -->
      </tr>
    </table>
  </body>
</html>

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