download data from titan network or gateway

By the end of this tutorial, you will learn how to:

• download complete file
• one by one download block

first, go to titan network to find the content. if it cannot be found,

go to the specified gateway or the default gateway to find the content.

default the gateway address is https://ipfs.io/ipfs,

default the locator address is http:https://39.108.143.56:5000.

if you want to download the complete file according to the cid，

just call NewDownloader production Downloader object,

then call Download() method or call GetReader() method.

of course, you can also customize the gateway address and locator address,

WithCustomGatewayAddressOption() method to customize the gateway address,

WithLocatorAddressOption() method to customize the locator address.

example:

    c, err := cid.Decode("QmUbaDBz6YKn3dVzoKrLDyupMmyWk5am2QSdgfKsU1RN3N")
    if err != nil {
        return
    }
    err = NewDownloader().Download(context.Background(), c, false, gzip.NoCompression, "./titan.mp4")
    if err != nil {
        return
    }

go to titan network to find the content.

default the locator address is http:https://39.108.143.56:5000.

if you want to download separate blocks according to the cid，

just call NewBlockGetter production BlockGetter object,

then, if you just want to get one block, call GetBlock() method,

if you want to get many blocks, call GetBlocks() method. of course,

you can also customize locator address, please call blockdownload

folder WithLocatorAddressOption() method to customize the locator address.

this function can be added to the ipfs code,

and titan can be used as a cache to speed up downloading data

example:

	c, err := cid.Decode("QmPgaP4SiadmrtFzEVY5aGTCRou5vbMDJCgEaJwuN9Lk4H")
	if err != nil {
		return
	}
	block, err := NewBlockGetter().GetBlock(context.Background(), c)
	if err != nil {
		return
	}

MIT license