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link previews via axios, shared code between netlify and vercel funct…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,199 +1,12 @@ | ||
| export default async function handler(request, response) { | ||
| const ethers = require('ethers'); | ||
|
|
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| const metascraper = require('metascraper')([ | ||
| require('metascraper-description')(), | ||
| require('metascraper-image')(), | ||
| require('metascraper-title')() | ||
| ]) | ||
| const { fetchMetadata } = require('../utils/linkPreviewUtils'); | ||
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| export default async function handler(request, response) { | ||
| const url = request.query.url; | ||
|
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| // link previews for specific sites | ||
| if (url.startsWith("https://sparklesnft.com/item/flare/")) { | ||
| // SPARKLES ITEM | ||
| const cleanUrl = url.split("?")[0]; | ||
| const addrTokenId = cleanUrl.split("https://sparklesnft.com/item/flare/")[1].replace("/", ""); | ||
| const addr = addrTokenId.split("_")[0]; | ||
| const tokenId = addrTokenId.split("_")[1]; | ||
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| const provider = new ethers.providers.JsonRpcProvider("https://flare-api.flare.network/ext/C/rpc"); | ||
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| const nftInterface = new ethers.utils.Interface([ | ||
| "function uri(uint256 _tokenId) external view returns (string memory)", | ||
| "function tokenURI(uint256 _tokenId) external view returns (string memory)" | ||
| ]); | ||
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| const nftContract = new ethers.Contract(addr, nftInterface, provider); | ||
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| let nftMetadataUri; | ||
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| try { | ||
| // erc-1155 | ||
| nftMetadataUri = await nftContract.uri(tokenId); | ||
| } catch (error) { | ||
| // erc-721 | ||
| nftMetadataUri = await nftContract.tokenURI(tokenId); | ||
| } | ||
|
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| let json; | ||
|
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| if ( | ||
| !nftMetadataUri.startsWith("https://") && | ||
| !nftMetadataUri.startsWith("http://") && | ||
| !nftMetadataUri.startsWith("ipfs://") | ||
| ) { | ||
| const result = atob(nftMetadataUri.substring(29)); | ||
| json = JSON.parse(result); | ||
| } else if (nftMetadataUri.startsWith("ipfs://")) { | ||
| // ipfs://QmTLJDoCTihqD3AkNkMMQFXLMQFZkdqLFR3Mdcg14Ln7bL/7.json | ||
| // https://bafkreiecjcejcg6h5wh2g3wcacy2lnod2mfrvimlr53ikvlsh53mw2zdty.ipfs.w3s.link/ | ||
| // https://QmTLJDoCTihqD3AkNkMMQFXLMQFZkdqLFR3Mdcg14Ln7bL.ipfs.dweb.link/7.json | ||
| // https://bafybeickgncmppcbrhg4cbzw3nxqajxoe2vj7ixmmcshddkyn5itv7ang4.ipfs.dweb.link/7.json | ||
|
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| json = { | ||
| "name": "Check this NFT on Sparkles", | ||
| "description": "Sparkles NFT Marketplace", | ||
| "image": "https://bafkreifyx3seviqnnhpcuge72lr7la3yfrvucr3n5aoqijzjul2fyzh64i.ipfs.w3s.link" | ||
| } | ||
| } else { | ||
| const res = await fetch(nftMetadataUri); | ||
| json = await res.json(); | ||
| } | ||
|
|
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| const finalMetadata = { | ||
| "url": url, | ||
| "title": json["name"], | ||
| "description": json["description"], | ||
| "image": { | ||
| url: json["image"] | ||
| } | ||
| }; | ||
|
|
||
| return response.status(200).json({ | ||
| data: finalMetadata | ||
| }); | ||
| } else if (url.startsWith("https://opensea.io/assets/base/")) { | ||
| // OPENSEA ITEM | ||
| const cleanUrl = url.split("?")[0]; | ||
| const addrTokenId = cleanUrl.split("opensea.io/assets/base/")[1]; | ||
| const addr = addrTokenId.split("/")[0]; | ||
| const tokenId = addrTokenId.split("/")[1].replace("/", ""); | ||
|
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| const provider = new ethers.providers.JsonRpcProvider("https://mainnet.base.org"); | ||
|
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| const nftInterface = new ethers.utils.Interface([ | ||
| "function uri(uint256 _tokenId) external view returns (string memory)", | ||
| "function tokenURI(uint256 _tokenId) external view returns (string memory)" | ||
| ]); | ||
|
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| const nftContract = new ethers.Contract(addr, nftInterface, provider); | ||
|
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| let nftMetadataUri; | ||
|
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| try { | ||
| // erc-1155 | ||
| nftMetadataUri = await nftContract.uri(tokenId); | ||
| } catch (error) { | ||
| // erc-721 | ||
| nftMetadataUri = await nftContract.tokenURI(tokenId); | ||
| } | ||
|
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| let json; | ||
|
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| if ( | ||
| !nftMetadataUri.startsWith("https://") && | ||
| !nftMetadataUri.startsWith("http://") && | ||
| !nftMetadataUri.startsWith("ipfs://") | ||
| ) { | ||
| const result = atob(nftMetadataUri.substring(29)); | ||
| json = JSON.parse(result); | ||
| } else if (nftMetadataUri.startsWith("ipfs://")) { | ||
| // ipfs://QmTLJDoCTihqD3AkNkMMQFXLMQFZkdqLFR3Mdcg14Ln7bL/7.json | ||
| // https://bafkreiecjcejcg6h5wh2g3wcacy2lnod2mfrvimlr53ikvlsh53mw2zdty.ipfs.w3s.link/ | ||
| // https://QmTLJDoCTihqD3AkNkMMQFXLMQFZkdqLFR3Mdcg14Ln7bL.ipfs.dweb.link/7.json | ||
| // https://bafybeickgncmppcbrhg4cbzw3nxqajxoe2vj7ixmmcshddkyn5itv7ang4.ipfs.dweb.link/7.json | ||
|
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| json = { | ||
| "name": "Check this NFT on OpenSea", | ||
| "description": "OpenSea is the world's first and largest web3 marketplace for NFTs and crypto collectibles. Browse, create, buy, sell, and auction NFTs using OpenSea today.", | ||
| "image": "https://static.opensea.io/og-images/Metadata-Image.png" | ||
| } | ||
| } else { | ||
| const res = await fetch(nftMetadataUri); | ||
| json = await res.json(); | ||
| } | ||
|
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| const finalMetadata = { | ||
| "url": url, | ||
| "title": json["name"], | ||
| "description": json["description"], | ||
| "image": { | ||
| url: json["image"] | ||
| } | ||
| }; | ||
|
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| return response.status(200).json({ | ||
| data: finalMetadata | ||
| }); | ||
| } else if (url.startsWith("https://twitter.com") || url.startsWith("https://x.com")) { | ||
| const finalMetadata = { | ||
| "url": url, | ||
| "title": "Twitter / X.com", | ||
| "description": "Elon's land, Elon's rules. Enter at your own risk.", | ||
| "image": { | ||
| url: "https://www.newswire.lk/wp-content/uploads/2022/12/elon-musk-twitter.jpg" | ||
| } | ||
| }; | ||
|
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| return response.status(200).json({ | ||
| data: finalMetadata | ||
| }); | ||
| } | ||
|
|
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| // link previews for all other sites | ||
| try { | ||
| const res = await fetch(url); | ||
| const html = await res.text(); | ||
|
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| const metadata = await metascraper({ html, url }); | ||
|
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| const finalMetadata = { | ||
| "url": url, | ||
| "title": metadata.title, | ||
| "description": metadata.description, | ||
| "image": { | ||
| url: metadata.image | ||
| } | ||
| }; | ||
|
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| if (finalMetadata?.title) { | ||
| if (url.startsWith("https://opensea.io") && (finalMetadata.title == "Access denied" || finalMetadata.title.startsWith("Just a moment"))) { | ||
| finalMetadata.title = "OpenSea"; | ||
| finalMetadata.description = "OpenSea is the world's first and largest web3 marketplace for NFTs and crypto collectibles. Browse, create, buy, sell, and auction NFTs using OpenSea today."; | ||
| finalMetadata.image.url = "https://static.opensea.io/og-images/Metadata-Image.png"; | ||
| } else if (url.startsWith("https://dune.com") && (finalMetadata.title.startsWith("Attention Required") || finalMetadata.title.startsWith("Just a moment"))) { | ||
| finalMetadata.title = "Dune"; | ||
| finalMetadata.description = "Blockchain ecosystem analytics by and for the community. Explore and share data from Ethereum, Polygon, Arbitrum, Optimism, and others for free."; | ||
| finalMetadata.image.url = "https://dune.com/assets/poster-1440w.png"; | ||
| } else if (finalMetadata.title.startsWith("Just a moment...")) { | ||
| return response.status(500).json({ | ||
| error: "Data not fetched yet." | ||
| }); | ||
| } | ||
| } | ||
|
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| return response.status(200).json({ | ||
| data: finalMetadata | ||
| }); | ||
|
|
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| } catch (error) { | ||
| console.error('Error fetching link preview metadata:', error); | ||
| const { metadata, status } = await fetchMetadata(url); | ||
|
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| return response.status(500).json({ | ||
| error: error | ||
| }); | ||
| } | ||
| return response.status(status).json({ | ||
| data: metadata | ||
| }); | ||
|
|
||
| }; |
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