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One script reply has been approved by the moderators Verified

Create a comment on a share or user generated content post. See the docs here

Created by hugo697 130 days ago Viewed 51 times
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Submitted by hugo697 Typescript (fetch-only)
Verified 130 days ago
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type Linkedin = {
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	token: string
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	apiVersion: string
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}
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type Base64 = string
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async function initializeImageUpload(resource: Linkedin, owner: string) {
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	const endpoint = 'https://api.linkedin.com/rest/images?action=initializeUpload'
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	const response = await fetch(endpoint, {
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		method: 'POST',
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		headers: {
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			Authorization: `Bearer ${resource.token}`,
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			'X-Restli-Protocol-Version': '2.0.0',
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			'Content-Type': 'application/json',
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			'LinkedIn-Version': `${resource.apiVersion}`
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		},
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		body: JSON.stringify({
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			initializeUploadRequest: {
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				owner
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			}
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		})
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	})
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	if (!response.ok) {
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		throw new Error(`HTTP error! status: ${response.status}`)
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	}
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	const data = await response.json()
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	return data.value
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}
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async function uploadImage(uploadUrl: string, image: Base64) {
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	const buffer = Buffer.from(image, 'base64')
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	const response = await fetch(uploadUrl, {
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		method: 'PUT',
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		headers: {
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			'Content-Type': 'application/octet-stream'
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		},
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		body: buffer
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	})
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	if (!response.ok) {
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		throw new Error(`HTTP error! status: ${response.status}`)
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	}
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}
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async function uploadImageForComment(resource: Linkedin, owner: string, image: Base64) {
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	const uploadData = await initializeImageUpload(resource, owner)
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	const uploadUrl = uploadData.uploadUrl
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	const imageUrn = uploadData.image
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	await uploadImage(uploadUrl, image)
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	return imageUrn
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}
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export async function main(
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	resource: Linkedin,
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	activityUrn: string, // can be either Share/Post/Comment Urn
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	commentData: {
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		actor: string
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		object: string
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		message: {
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			text: string
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		}
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		content?: [
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			{
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				entity: {
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					// Different argument for versioned API.
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					digitalmediaAsset: string // Not Base64, has to be a URN returned by the Image API.
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				}
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			}
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		]
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		parentComment?: string
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	},
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	image?: Base64
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) {
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	if (image) {
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		const imageUrn = (await uploadImageForComment(resource, commentData.actor, image)).replace(
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			'image',
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			'digitalmediaAsset'
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		)
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		commentData.content = [
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			{
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				entity: {
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					digitalmediaAsset: imageUrn
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				}
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			}
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		]
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	}
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	const encodedActivityUrn = encodeURIComponent(activityUrn)
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	const endpoint = `https://api.linkedin.com/v2/socialActions/${encodedActivityUrn}/comments`
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	const response = await fetch(endpoint, {
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		method: 'POST',
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		headers: {
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			Authorization: `Bearer ${resource.token}`,
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			'X-Restli-Protocol-Version': '2.0.0',
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			'Content-Type': 'application/json'
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		},
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		body: JSON.stringify(commentData)
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	})
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	if (!response.ok) {
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		throw new Error(`HTTP error! status: ${response.status}`)
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	}
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	const data = await response.json()
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	return data
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}
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