fix: add fallback download url

CHANGELOG.md

@@ -1,3 +1,22 @@
+# Changelog for 1.1.1
+
+The following sections list the changes for 1.1.1.
+
+## Summary
+
+ * Fix #8: Some mods are missing a download URL
+
+## Details
+
+ * Bugfix #8: Some mods are missing a download URL
+
+   We found the cases where the provided download URL from the curseforge API were missing, to work
+   around this we are constructing the URL as a fallback now. This is identicated by the fallback
+   flag within the logs now.
+
+   https://github.com/webhippie/cursecli/issues/8
+
+
 # Changelog for 1.1.0
 
 The following sections list the changes for 1.1.0.

changelog/1.1.1_2022-05-22/download-urls.md

@@ -0,0 +1,7 @@
+Bugfix: Some mods are missing a download URL
+
+We found the cases where the provided download URL from the curseforge API were
+missing, to work around this we are constructing the URL as a fallback now. This
+is identicated by the fallback flag within the logs now.
+
+https://github.com/webhippie/cursecli/issues/8

pkg/forge/forge.go

@@ -83,12 +83,6 @@ func (f *Forge) DownloadManifest() error {
 		download := File{}
 
 		if err := json.Unmarshal(body, &download); err != nil {
-			fmt.Printf(
-				downloadURL,
-				file.ProjectID,
-				file.FileID,
-			)
-
 			log.Error().
 				Err(err).
 				Int("project", file.ProjectID).
@@ -107,6 +101,7 @@ func (f *Forge) DownloadManifest() error {
 				Int("project", file.ProjectID).
 				Int("file", file.FileID).
 				Str("name", download.Name).
+				Bool("fallback", download.Fallback).
 				Msg("Failed to download mod")
 
 			return err
@@ -116,6 +111,7 @@ func (f *Forge) DownloadManifest() error {
 			Int("project", file.ProjectID).
 			Int("file", file.FileID).
 			Str("name", download.Name).
+			Bool("fallback", download.Fallback).
 			Msg("Successfully downloaded mod")
 	}
 

pkg/forge/types.go

@@ -2,6 +2,8 @@ package forge
 
 import (
 	"encoding/json"
+	"fmt"
+	"strconv"
 )
 
 // HashAlgo defines the available hash algorithms.
@@ -33,11 +35,12 @@ var HashAlgoToID = map[string]HashAlgo{
 
 // File represents a single file from the forgesvc API.
 type File struct {
-	ID     int    `json:"id"`
-	Name   string `json:"fileName"`
-	Size   int    `json:"fileLength"`
-	URL    string `json:"downloadUrl"`
-	Hashes []Hash `json:"hashes"`
+	ID       int    `json:"id"`
+	Name     string `json:"fileName"`
+	Size     int    `json:"fileLength"`
+	URL      string `json:"downloadUrl"`
+	Fallback bool   `json:"-"`
+	Hashes   []Hash `json:"hashes"`
 }
 
 // UnmarshalJSON implements the JSON unmarshaling.
@@ -50,6 +53,20 @@ func (f *File) UnmarshalJSON(b []byte) error {
 	}
 
 	*f = File(v)
+
+	if f.URL == "" {
+		identifier := strconv.Itoa(f.ID)
+
+		f.URL = fmt.Sprintf(
+			"https://edge.forgecdn.net/files/%s/4%s/%s",
+			identifier[0:4],
+			identifier[5:len(identifier)-1],
+			f.Name,
+		)
+
+		f.Fallback = true
+	}
+
 	return nil
 }