Support downloading remote files to a server via the API

Co-authored-by: Dane Everitt <dane@daneeveritt.com>
This commit is contained in:
Caleb 2020-12-15 22:59:18 -05:00 committed by GitHub
parent 84c05efaa5
commit 8f26c31df6
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3 changed files with 69 additions and 7 deletions

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@ -1,6 +1,7 @@
package router
import (
"errors"
"github.com/gin-gonic/gin"
"github.com/google/uuid"
"github.com/pterodactyl/wings/config"
@ -60,6 +61,9 @@ func AuthorizationMiddleware(c *gin.Context) {
}
// Helper function to fetch a server out of the servers collection stored in memory.
//
// This function should not be used in new controllers, prefer ExtractServer where
// possible.
func GetServer(uuid string) *server.Server {
return server.GetServers().Find(func(s *server.Server) bool {
return uuid == s.Id()
@ -70,12 +74,24 @@ func GetServer(uuid string) *server.Server {
// locate it.
func ServerExists(c *gin.Context) {
u, err := uuid.Parse(c.Param("server"))
if err != nil || GetServer(u.String()) == nil {
if err == nil {
if s := GetServer(u.String()); s != nil {
c.Set("server", s)
c.Next()
return
}
}
c.AbortWithStatusJSON(http.StatusNotFound, gin.H{
"error": "The resource you requested does not exist.",
})
return
}
c.Next()
// Returns the server instance from the gin context. If there is no server set in the
// context (e.g. calling from a controller not protected by ServerExists) this function
// will panic.
func ExtractServer(c *gin.Context) *server.Server {
if s, ok := c.Get("server"); ok {
return s.(*server.Server)
}
panic(errors.New("cannot extract server, missing on gin context"))
}

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@ -83,6 +83,7 @@ func Configure() *gin.Engine {
files.PUT("/rename", putServerRenameFiles)
files.POST("/copy", postServerCopyFile)
files.POST("/write", postServerWriteFile)
files.POST("/writeUrl", postServerDownloadRemoteFile)
files.POST("/create-directory", postServerCreateDirectory)
files.POST("/delete", postServerDeleteFiles)
files.POST("/compress", postServerCompressFiles)

View File

@ -225,6 +225,51 @@ func postServerWriteFile(c *gin.Context) {
c.Status(http.StatusNoContent)
}
// Writes the contents of the remote URL to a file on a server.
func postServerDownloadRemoteFile(c *gin.Context) {
s := ExtractServer(c)
var data struct {
URL string `binding:"required" json:"url"`
BasePath string `json:"path"`
}
if err := c.BindJSON(&data); err != nil {
return
}
u, err := url.Parse(data.URL)
if err != nil {
if e, ok := err.(*url.Error); ok {
c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
"error": "An error occurred while parsing that URL: " + e.Err.Error(),
})
return
}
TrackedServerError(err, s).AbortWithServerError(c)
return
}
resp, err := http.Get(u.String())
if err != nil {
TrackedServerError(err, s).AbortWithServerError(c)
return
}
defer resp.Body.Close()
filename := strings.Split(u.Path, "/")
if err := s.Filesystem().Writefile(filepath.Join(data.BasePath, filename[len(filename)-1]), resp.Body); err != nil {
if errors.Is(err, filesystem.ErrIsDirectory) {
c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
"error": "Cannot write file, name conflicts with an existing directory by the same name.",
})
return
}
TrackedServerError(err, s).AbortFilesystemError(c)
return
}
c.Status(http.StatusNoContent)
}
// Create a directory on a server.
func postServerCreateDirectory(c *gin.Context) {
s := GetServer(c.Param("server"))