some more

main.go

@@ -2,7 +2,9 @@ package main
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
+	"io"
 	"net/http"
 	"net/url"
 	"os"
@@ -148,6 +150,121 @@ func main() {
 		fmt.Fprintf(os.Stderr, "Failed to get index: %s\n", err)
 		os.Exit(1)
 	}
-	url := urls[i]
+	unparsedUrl := urls[i]
-	fmt.Println(url)
+	fmt.Println(unparsedUrl)
+	parsedUrl, err := url.Parse(unparsedUrl)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to parse url: %s\n", err)
+		os.Exit(1)
+	}
+	domain := submission.Domain
+	if domain == "" {
+		domain = parsedUrl.Hostname()
+	}
+	path := parsedUrl.EscapedPath()
+	pathExtless, pathExt := SplitExt(path)
+	urls = make([]string, 1)
+	urls[0] = unparsedUrl
+	if domain == "imgur.com" || strings.HasSuffix(domain, ".imgur.com") {
+		parsedUrl.Host = "i.imgur.com"
+		if strings.HasPrefix(path, "/a/") || strings.HasPrefix(path, "/gallery/") {
+			albumId := strings.SplitN(path, "/", 4)[2]
+			imgurImages, err := GetImgurAlbum(client, albumId)
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "Failed to get imgur album: %s\n", err)
+				os.Exit(1)
+			}
+			urls = nil
+			for _, i := range imgurImages {
+				urls = append(urls, "https://i.imgur.com/"+i.Hash+i.Ext)
+			}
+		} else {
+			if pathExt == ".gifv" {
+				parsedUrl.RawPath = pathExtless + ".mp4"
+			}
+			urls[0] = parsedUrl.String()
+		}
+	} else if domain == "gfycat.com" {
+		gfyMp4, err := GetGfycat(client, pathExtless)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to get gfycat video: %s\n", err)
+			os.Exit(1)
+		}
+		if gfyMp4 != "" {
+			urls[0] = gfyMp4
+		}
+	} else if submission.IsRedditMediaDomain && submission.Preview != nil {
+		preview := submission.Preview.Images[0]
+		if pathExt == ".gif" {
+			if preview.Variants.Mp4 != nil {
+				urls[0] = preview.Variants.Mp4.Url
+			} else if preview.Variants.Gif != nil {
+				urls[0] = preview.Variants.Gif.Url
+			}
+		} else if submission.IsVideo {
+			urls[0] = preview.Source.Url
+		}
+	}
+	i, err = InteractivelyAskIndex(stdin, urls)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to get index: %s\n", err)
+		os.Exit(1)
+	}
+	unparsedUrl = urls[i]
+	fmt.Println(unparsedUrl)
+	response, err := client.Get(unparsedUrl)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to get response: %s\n", err)
+		os.Exit(1)
+	}
+	defer response.Body.Close()
+	ext, err := GetExtension(response.Header.Get("Content-Type"))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Warning: Failed to get file extension: %s\n", err)
+	} else {
+		filename = filename + ext
+	}
+	fmt.Printf("Downloading to %s\n", filename)
+	file, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE, 0o664)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to open file for writing: %s\n", err)
+		os.Exit(1)
+	}
+	writer := bufio.NewWriter(file)
+	defer writer.Flush()
+	reader := bufio.NewReader(response.Body)
+	contentLengthString := ""
+	if response.ContentLength >= 0 {
+		contentLengthString = FormatBytes(float64(response.ContentLength))
+	}
+	lastOutputLength := 0
+	bytesDownloaded := 0
+	toWrite := make([]byte, 1024*1024)
+	for {
+		output := fmt.Sprintf("%s downloaded", FormatBytes(float64(bytesDownloaded)))
+		if response.ContentLength >= 0 {
+			output = fmt.Sprintf("%s out of %s downloaded (%.2f%%)", FormatBytes(float64(bytesDownloaded)), contentLengthString, float64(bytesDownloaded)/float64(response.ContentLength)*100.0)
+		}
+		fmt.Print(output)
+		for i := 0; i < lastOutputLength-len(output); i++ {
+			fmt.Print(" ")
+		}
+		lastOutputLength = len(output)
+		fmt.Print("\r")
+		n, err := reader.Read(toWrite)
+		if n == 0 && errors.Is(err, io.EOF) {
+			break
+		}
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to read response: %s\n", err)
+			os.Exit(1)
+		}
+		_, err = writer.Write(toWrite[:n])
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to write response: %s\n", err)
+			os.Exit(1)
+		}
+		bytesDownloaded += n
+	}
+	fmt.Println()
 }

structs.go

@@ -61,17 +61,18 @@ type Submission struct {
 		} `json:"s"`
 	} `json:"media_metadata"`
 	IsRedditMediaDomain bool `json:"is_reddit_media_domain"`
-	Preview             struct {
+	Preview             *struct {
 		Images []struct {
 			Variants struct {
 				Mp4 *PreviewSource `json:"mp4"`
 				Gif *PreviewSource `json:"gif"`
 			} `json:"variants"`
-		} `json:"images"`
 			Source *PreviewSource `json:"source"`
+		} `json:"images"`
 	} `json:"preview"`
 	IsSelf bool   `json:"is_self"`
 	Title  string `json:"title"`
+	Domain string `json:"domain"`
 }
 
 type SubmissionResponseItem struct {
@@ -81,3 +82,20 @@ type SubmissionResponseItem struct {
 		} `json:"children"`
 	} `json:"data"`
 }
+
+type ImgurImage struct {
+	Hash string `json:"hash"`
+	Ext  string `json:"ext"`
+}
+
+type ImgurResponse struct {
+	Data struct {
+		Images []ImgurImage `json:"images"`
+	} `json:"data"`
+}
+
+type GfycatResponse struct {
+	GfyItem struct {
+		Mp4Url string `json:"mp4Url"`
+	} `json:"gfyItem"`
+}

utils.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
+	"mime"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -172,3 +173,96 @@ func InteractivelyAskIndex(stdin *bufio.Reader, items []string) (int, error) {
 	}
 	return i, nil
 }
+
+func SplitExt(str string) (string, string) {
+	if str == "" {
+		return "", ""
+	}
+	s := strings.Split(str[1:], ".")
+	if len(s) < 2 {
+		return str, ""
+	}
+	return str[:1] + strings.Join(s[:len(s)-1], "."), "." + s[len(s)-1]
+}
+
+func GetImgurAlbum(client *http.Client, albumId string) ([]ImgurImage, error) {
+	response, err := client.Get("https://imgur.com/ajaxalbums/getimages/" + albumId + "/hit.json?all=true")
+	if err != nil {
+		return nil, fmt.Errorf("Failed to get response: %s", err)
+	}
+	contents, err := io.ReadAll(response.Body)
+	response.Body.Close()
+	if err != nil {
+		return nil, fmt.Errorf("Failed to read response body: %s", err)
+	}
+	if response.StatusCode != 200 {
+		return nil, fmt.Errorf("Response returned status code %d, body: %s", response.StatusCode, contents)
+	}
+	var imgurResponse *ImgurResponse
+	err = json.Unmarshal(contents, &imgurResponse)
+	if err != nil {
+		return nil, fmt.Errorf("Failed to parse response: %s", err)
+	}
+	return imgurResponse.Data.Images, nil
+}
+
+func GetGfycat(client *http.Client, gfyId string) (string, error) {
+	response, err := client.Get("https://api.gfycat.com/v1/gfycats/" + gfyId)
+	if err != nil {
+		return "", fmt.Errorf("Failed to get response: %s", err)
+	}
+	contents, err := io.ReadAll(response.Body)
+	response.Body.Close()
+	if err != nil {
+		return "", fmt.Errorf("Failed to read response body: %s", err)
+	}
+	if response.StatusCode != 200 {
+		return "", fmt.Errorf("Response returned status code %d, body: %s", response.StatusCode, contents)
+	}
+	var gfycatResponse *GfycatResponse
+	err = json.Unmarshal(contents, &gfycatResponse)
+	if err != nil {
+		return "", fmt.Errorf("Failed to parse response: %s", err)
+	}
+	return gfycatResponse.GfyItem.Mp4Url, nil
+}
+
+func FormatBytes(size float64) string {
+	label := ""
+	if size >= 1024 {
+		size /= 1024
+		label = "K"
+	}
+	if size >= 1024 {
+		size /= 1024
+		label = "M"
+	}
+	if size >= 1024 {
+		size /= 1024
+		label = "G"
+	}
+	if size >= 1024 {
+		size /= 1024
+		label = "T"
+	}
+	return fmt.Sprintf("%.2f %sB", size, label)
+}
+
+func GetExtension(mimeType string) (string, error) {
+	if mimeType == "" {
+		return "", nil
+	}
+	mediaType, _, err := mime.ParseMediaType(mimeType)
+	if err != nil {
+		return "", fmt.Errorf("Failed to parse media type of %s: %s", mimeType, err)
+	}
+	exts, err := mime.ExtensionsByType(mediaType)
+	if err != nil {
+		return "", fmt.Errorf("Failed to find file extensions of %s: %s", mediaType, err)
+	}
+	if len(exts) < 1 {
+		return "", nil
+	}
+	fmt.Println(exts)
+	return exts[0], nil
+}