tanaikech · September 21, 2023 17:01 · Sep 22, 2017 · Sep 21, 2017 · Sep 21, 2017
diff --git a/submit.md b/submit.md
@@ -140,3 +140,4 @@ Also I got the information for this sample from godoc and GitHub of google-api-g
 - Files.Create : [godoc](https://godoc.org/google.golang.org/api/drive/v3#FilesCreateCall) and [GitHub](https://github.com/google/google-api-go-client/blob/master/drive/v3/drive-gen.go#L3996)
 - Permissions.Create : [godoc](https://godoc.org/google.golang.org/api/drive/v3#Permission) and [GitHub](https://github.com/google/google-api-go-client/blob/master/drive/v3/drive-gen.go#L1388)
 
+I have answered this at [stackoverflow](https://stackoverflow.com/questions/46334646/google-drive-api-v3-create-and-upload-file/46337094#46337094).
diff --git a/submit.md b/submit.md
@@ -1,8 +1,7 @@
 # Uploading CSV File as Spreadsheet and Modifying Permissions using Golang
 This sample script is for uploading CSV file as Spreadsheet and modifying permissions using Golang.
 
-I think that the detail information of google-api-go-client is a bit little. The sample scripts are so little. It retrieves most information from only [godoc](https://godoc.org/google.golang.org/api/drive/v3 and [GitHub](https://github.com/google/google-api-go-client/tree/master/drive). So I publish such sample scripts here. If this is useful for you, I'm glad.
-
+I think that the detail information of **google-api-go-client** is a bit little. The sample scripts are so little. It retrieves most information from only [godoc](https://godoc.org/google.golang.org/api/drive/v3) and [GitHub](https://github.com/google/google-api-go-client/tree/master/drive). So I publish such sample scripts here. If this is useful for you, I'm glad.
 
 ## Important points :
 1. Give mimeType of file that it wants to upload to ``options`` of ``Media(r io.Reader, options ...googleapi.MediaOption)``.

diff --git a/submit.md b/submit.md
@@ -0,0 +1,143 @@
+# Uploading CSV File as Spreadsheet and Modifying Permissions using Golang
+This sample script is for uploading CSV file as Spreadsheet and modifying permissions using Golang.
+
+I think that the detail information of google-api-go-client is a bit little. The sample scripts are so little. It retrieves most information from only [godoc](https://godoc.org/google.golang.org/api/drive/v3 and [GitHub](https://github.com/google/google-api-go-client/tree/master/drive). So I publish such sample scripts here. If this is useful for you, I'm glad.
+
+
+## Important points :
+1. Give mimeType of file that it wants to upload to ``options`` of ``Media(r io.Reader, options ...googleapi.MediaOption)``.
+1. In order to give ``options``, use ``googleapi.ContentType()``.
+1. Give mimeType of file that it wants to convert, when it uploads it to Google Drive, to ``file`` of ``Create(file *File)``.
+1. In order to give ``file``, use ``&drive.File{}``.
+1. For installing permissions, use ``&drive.Permission{}``. Each parameter is the same to them for Python.
+
+**This sample script uses [Quickstart](https://developers.google.com/drive/v3/web/quickstart/go). So in order to use this sample script, at first, please do Step 1 and Step 2 of the Quickstart.**
+
+## Sample script :
+~~~go
+package main
+
+import (
+    "encoding/json"
+    "fmt"
+    "io/ioutil"
+    "log"
+    "net/http"
+    "os"
+
+    "golang.org/x/net/context"
+    "golang.org/x/oauth2"
+    "golang.org/x/oauth2/google"
+    "google.golang.org/api/drive/v3"
+    "google.golang.org/api/googleapi"
+)
+
+func getClient(ctx context.Context, config *oauth2.Config) *http.Client {
+    cacheFile := "./go-quickstart.json"
+    tok, err := tokenFromFile(cacheFile)
+    if err != nil {
+        tok = getTokenFromWeb(config)
+        saveToken(cacheFile, tok)
+    }
+    return config.Client(ctx, tok)
+}
+
+func getTokenFromWeb(config *oauth2.Config) *oauth2.Token {
+    authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
+    fmt.Printf("Go to the following link in your browser then type the "+
+        "authorization code: \n%v\n", authURL)
+    var code string
+    if _, err := fmt.Scan(&code); err != nil {
+        log.Fatalf("Unable to read authorization code %v", err)
+    }
+    tok, err := config.Exchange(oauth2.NoContext, code)
+    if err != nil {
+        log.Fatalf("Unable to retrieve token from web %v", err)
+    }
+    return tok
+}
+
+func tokenFromFile(file string) (*oauth2.Token, error) {
+    f, err := os.Open(file)
+    if err != nil {
+        return nil, err
+    }
+    t := &oauth2.Token{}
+    err = json.NewDecoder(f).Decode(t)
+    defer f.Close()
+    return t, err
+}
+
+func saveToken(file string, token *oauth2.Token) {
+    fmt.Printf("Saving credential file to: %s\n", file)
+    f, err := os.Create(file)
+    if err != nil {
+        log.Fatalf("Unable to cache oauth token: %v", err)
+    }
+    defer f.Close()
+    json.NewEncoder(f).Encode(token)
+}
+
+func main() {
+    ctx := context.Background()
+    b, err := ioutil.ReadFile("client_secret.json")
+    if err != nil {
+        log.Fatalf("Unable to read client secret file: %v", err)
+    }
+    config, err := google.ConfigFromJSON(b, drive.DriveScope)
+    if err != nil {
+        log.Fatalf("Unable to parse client secret file to config: %v", err)
+    }
+    client := getClient(ctx, config)
+    srv, err := drive.New(client)
+    if err != nil {
+        log.Fatalf("Unable to retrieve drive Client %v", err)
+    }
+
+
+    // Upload CSV and convert to Spreadsheet
+    filename := "sample.csv"                                       // File you want to upload
+    baseMimeType := "text/csv"                                     // mimeType of file you want to upload
+    convertedMimeType := "application/vnd.google-apps.spreadsheet" // mimeType of file you want to convert on Google Drive
+
+    file, err := os.Open(filename)
+    if err != nil {
+        log.Fatalf("Error: %v", err)
+    }
+    defer file.Close()
+    f := &drive.File{
+        Name:     filename,
+        MimeType: convertedMimeType,
+    }
+    res, err := srv.Files.Create(f).Media(file, googleapi.ContentType(baseMimeType)).Do()
+    if err != nil {
+        log.Fatalf("Error: %v", err)
+    }
+    fmt.Printf("%s, %s, %s\n", res.Name, res.Id, res.MimeType)
+
+
+    // Modify permissions
+    permissiondata := &drive.Permission{
+        Type:               "domain",
+        Role:               "writer",
+        Domain:             "google.com",
+        AllowFileDiscovery: true,
+    }
+    pres, err := srv.Permissions.Create(res.Id, permissiondata).Do()
+    if err != nil {
+        log.Fatalf("Error: %v", err)
+    }
+    fmt.Printf("%s, %s\n", pres.Type, pres.Role)
+}
+~~~
+
+## Result :
+    sample.csv, ### file ID on Google Drive ###, application/vnd.google-apps.spreadsheet
+    domain, writer
+
+## References :
+Also I got the information for this sample from godoc and GitHub of google-api-go-client.
+
+- Files.Create : [godoc](https://godoc.org/google.golang.org/api/drive/v3#FilesCreateCall) and [GitHub](https://github.com/google/google-api-go-client/blob/master/drive/v3/drive-gen.go#L3996)
+- Permissions.Create : [godoc](https://godoc.org/google.golang.org/api/drive/v3#Permission) and [GitHub](https://github.com/google/google-api-go-client/blob/master/drive/v3/drive-gen.go#L1388)
+
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