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Merge pull request #622 from ipfs/release-v0.21.0
Release v0.21.0
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car-file-fetcher | ||
fetcher | ||
hello.txt |
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# CAR File Fetcher | ||
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This example shows how to download a UnixFS file or directory from a gateway that implements | ||
[application/vnd.ipld.car](https://www.iana.org/assignments/media-types/application/vnd.ipld.car) | ||
responses of the [Trustles Gateway](https://specs.ipfs.tech/http-gateways/trustless-gateway/) | ||
specification, in a trustless, verifiable manner. | ||
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It relies on [IPIP-402](https://specs.ipfs.tech/ipips/ipip-0402/) to retrieve | ||
the file entity via a single CAR request with all blocks required for end-to-end | ||
verification. | ||
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## Build | ||
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```bash | ||
> go build -o fetcher | ||
``` | ||
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## Usage | ||
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First, you need a gateway that complies with the Trustless Gateway specification. | ||
In our specific case, we need that the gateway supports CAR response type. | ||
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As an example, you can verifiably fetch a `hello.txt` file from IPFS gateway at `https://trustless-gateway.link`: | ||
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``` | ||
./fetcher -g https://trustless-gateway.link -o hello.txt /ipfs/bafkreifzjut3te2nhyekklss27nh3k72ysco7y32koao5eei66wof36n5e | ||
``` |
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