79 lines
3.0 KiB
Go
79 lines
3.0 KiB
Go
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package Admin
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import (
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"fmt"
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"github.com/SommerEngineering/Ocean/CustomerDB"
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"github.com/SommerEngineering/Ocean/Log"
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LM "github.com/SommerEngineering/Ocean/Log/Meta"
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"github.com/SommerEngineering/Ocean/MimeTypes"
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"github.com/SommerEngineering/Ocean/Shutdown"
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"io"
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"net/http"
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"strings"
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)
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// Handler for accessing the file upload function.
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func HandlerFileUpload(response http.ResponseWriter, request *http.Request) {
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// Case: The system goes down now.
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if Shutdown.IsDown() {
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http.NotFound(response, request)
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return
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}
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if strings.ToLower(request.Method) == `get` {
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//
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// Case: Send the website to the client
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//
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// Write the MIME type and execute the template:
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MimeTypes.Write2HTTP(response, MimeTypes.TypeWebHTML)
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if executeError := AdminTemplates.ExecuteTemplate(response, `FileUpload`, nil); executeError != nil {
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Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelERROR, LM.SeverityCritical, LM.ImpactCritical, LM.MessageNameEXECUTE, `Was not able to execute the file upload template.`, executeError.Error())
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}
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} else {
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//
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// Case: Receive the file to upload
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//
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if file, fileHeader, fileError := request.FormFile(`file`); fileError != nil {
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Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelERROR, LM.SeverityCritical, LM.ImpactCritical, LM.MessageNameBROWSER, `Was not able to access the file uploaded.`, fileError.Error())
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} else {
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//
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// Case: Access was possible.
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//
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// Get the GridFS from the database:
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dbSession, gridFS := CustomerDB.GridFS()
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defer dbSession.Close()
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// Try to create the desired file at the grid file system:
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if newFile, errNewFile := gridFS.Create(fileHeader.Filename); errNewFile != nil {
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Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelERROR, LM.SeverityCritical, LM.ImpactCritical, LM.MessageNameDATABASE, `Was not able to create the desired file at the grid file system.`, errNewFile.Error(), fmt.Sprintf("filename='%s'", fileHeader.Filename))
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} else {
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// Close the files afterwards:
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defer file.Close()
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defer newFile.Close()
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// Try to copy the file's content to the database:
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if _, errCopy := io.Copy(newFile, file); errCopy != nil {
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Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelERROR, LM.SeverityCritical, LM.ImpactCritical, LM.MessageNameNETWORK, `Was not able to copy the desired file's content to the grid file system.`, errNewFile.Error(), fmt.Sprintf("filename='%s'", fileHeader.Filename))
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} else {
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// Try to determine the MIME type:
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if mimeType, errMime := MimeTypes.DetectType(fileHeader.Filename); errMime != nil {
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Log.LogFull(senderName, LM.CategorySYSTEM, LM.LevelERROR, LM.SeverityLow, LM.ImpactLow, LM.MessageNamePARSE, `Was not able to parse the desired file's MIME type.`, errMime.Error(), fmt.Sprintf("filename='%s'", fileHeader.Filename))
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} else {
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// Set also the MIME type in the database:
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newFile.SetContentType(mimeType.MimeType)
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}
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}
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}
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}
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// Redirect the client to the admin's overview:
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defer http.Redirect(response, request, "/", 302)
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}
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}
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