nytpu
90 lines
2.0 KiB
Go
90 lines
2.0 KiB
Go
// Copyright (C) 2021 nytpu
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// SPDX-License-Identifier: AGPL-3.0-only
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// For more license details, see LICENSE or <https://www.gnu.org/licenses/agpl-3.0.html>.
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package fetch
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import (
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"bytes"
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"crypto/sha256"
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"fmt"
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"io"
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"time"
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"github.com/mmcdole/gofeed"
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"github.com/prologic/go-gopher"
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"golang.nytpu.com/comitium/core"
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)
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// fetchGopher will make a request for a gopher resource
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func fetchGopher(remote string) (*gopher.Response, error) {
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resp, err := gopher.Get(remote)
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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// gopherFeed will fetch and insert a new core.Feed into a core.FullData given a
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// gopher url (or update if it's preexisting)
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func gopherFeed(data *core.FullData, remote string, title string) error {
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resp, err := fetchGopher(remote)
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if err != nil {
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return err
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}
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if len(resp.Dir.Items) != 0 {
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// TODO
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return fmt.Errorf(core.Localizer.Get("errors.gopher_no_extract"))
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}
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defer resp.Body.Close()
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reader := io.LimitReader(resp.Body, 1073741824) // 1 GiB
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gofeed, err := gofeed.NewParser().Parse(reader)
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if err != nil {
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return err
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}
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feed, err := core.GofeedConvert(gofeed, title)
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if err != nil {
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return err
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}
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data.InsertFeed(feed, remote)
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return nil
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}
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// gopherPage will fetch and insert a new core.Page into a core.FullData given a
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// gopher url (or update if it's preexisting)
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func gopherPage(data *core.FullData, remote string, title string) error {
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resp, err := fetchGopher(remote)
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if err != nil {
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return err
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}
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var reader io.Reader
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if len(resp.Dir.Items) > 0 {
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text, err := resp.Dir.ToText()
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if err != nil {
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return err
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}
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reader = io.LimitReader(bytes.NewReader(text), 1073741824) // 1 GiB
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} else {
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defer resp.Body.Close()
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reader = io.LimitReader(resp.Body, 1073741824) // 1 GiB
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}
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var page core.Page
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page.Title = title
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page.Link = remote
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h := sha256.New()
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if _, err := io.Copy(h, reader); err != nil {
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return err
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}
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newHash := fmt.Sprintf("%x", h.Sum(nil))
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page.Hash = newHash
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page.Updated = time.Now()
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data.InsertPage(&page, remote)
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return nil
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}
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