-
Notifications
You must be signed in to change notification settings - Fork 385
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #142 from ponzu-cms/ponzu-dev
[core] add CSVFormattable interface to export CSV formatted content
- Loading branch information
Showing
5 changed files
with
192 additions
and
5 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| // Package format provides interfaces to format content into various kinds of | ||
| // data | ||
| package format | ||
|
|
||
| // CSVFormattable is implemented with the method FormatCSV, which must return the ordered | ||
| // slice of JSON struct tag names for the type implmenting it | ||
| type CSVFormattable interface { | ||
| FormatCSV() []string | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package admin | ||
|
|
||
| import ( | ||
| "encoding/csv" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "log" | ||
| "net/http" | ||
| "os" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/ponzu-cms/ponzu/management/format" | ||
| "github.com/ponzu-cms/ponzu/system/db" | ||
| "github.com/ponzu-cms/ponzu/system/item" | ||
|
|
||
| "github.com/tidwall/gjson" | ||
| ) | ||
|
|
||
| func exportHandler(res http.ResponseWriter, req *http.Request) { | ||
| // /admin/contents/export?type=Blogpost&format=csv | ||
| q := req.URL.Query() | ||
| t := q.Get("type") | ||
| f := strings.ToLower(q.Get("format")) | ||
|
|
||
| if t == "" || f == "" { | ||
| v, err := Error400() | ||
| if err != nil { | ||
| res.WriteHeader(http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| res.WriteHeader(http.StatusBadRequest) | ||
| _, err = res.Write(v) | ||
| if err != nil { | ||
| res.WriteHeader(http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| } | ||
|
|
||
| pt, ok := item.Types[t] | ||
| if !ok { | ||
| res.WriteHeader(http.StatusBadRequest) | ||
| return | ||
| } | ||
|
|
||
| switch f { | ||
| case "csv": | ||
| csv, ok := pt().(format.CSVFormattable) | ||
| if !ok { | ||
| res.WriteHeader(http.StatusBadRequest) | ||
| return | ||
| } | ||
|
|
||
| fields := csv.FormatCSV() | ||
| exportCSV(res, req, pt, fields) | ||
|
|
||
| default: | ||
| res.WriteHeader(http.StatusBadRequest) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| func exportCSV(res http.ResponseWriter, req *http.Request, pt func() interface{}, fields []string) { | ||
| tmpFile, err := ioutil.TempFile(os.TempDir(), "exportcsv-") | ||
| if err != nil { | ||
| log.Println("Failed to create tmp file for CSV export:", err) | ||
| res.WriteHeader(http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| err = os.Chmod(tmpFile.Name(), 0666) | ||
| if err != nil { | ||
| log.Println("chmod err:", err) | ||
| } | ||
|
|
||
| csvBuf := csv.NewWriter(tmpFile) | ||
|
|
||
| t := req.URL.Query().Get("type") | ||
|
|
||
| // get content data and loop through creating a csv row per result | ||
| bb := db.ContentAll(t) | ||
|
|
||
| // add field names to first row | ||
| err = csvBuf.Write(fields) | ||
| if err != nil { | ||
| res.WriteHeader(http.StatusInternalServerError) | ||
| log.Println("Failed to write column headers:", fields) | ||
| return | ||
| } | ||
|
|
||
| for row := range bb { | ||
| // unmarshal data and loop over fields | ||
| rowBuf := []string{} | ||
|
|
||
| for _, col := range fields { | ||
| // pull out each field as the column value | ||
| result := gjson.GetBytes(bb[row], col) | ||
|
|
||
| // append it to the buffer | ||
| rowBuf = append(rowBuf, result.String()) | ||
| } | ||
|
|
||
| // write row to csv | ||
| err := csvBuf.Write(rowBuf) | ||
| if err != nil { | ||
| res.WriteHeader(http.StatusInternalServerError) | ||
| log.Println("Failed to write column headers:", fields) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| csvBuf.Flush() | ||
|
|
||
| // write the buffer to a content-disposition response | ||
| fi, err := tmpFile.Stat() | ||
| if err != nil { | ||
| log.Println("Failed to read tmp file info for CSV export:", err) | ||
| res.WriteHeader(http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| err = tmpFile.Close() | ||
| if err != nil { | ||
| log.Println("Failed to close tmp file for CSV export:", err) | ||
| } | ||
|
|
||
| ts := time.Now().Unix() | ||
| disposition := `attachment; filename="export-%s-%d.csv"` | ||
|
|
||
| res.Header().Set("Content-Type", "text/csv") | ||
| res.Header().Set("Content-Disposition", fmt.Sprintf(disposition, t, ts)) | ||
| res.Header().Set("Content-Length", fmt.Sprintf("%d", int(fi.Size()))) | ||
|
|
||
| http.ServeFile(res, req, tmpFile.Name()) | ||
|
|
||
| err = os.Remove(tmpFile.Name()) | ||
| if err != nil { | ||
| log.Println("Failed to remove tmp file for CSV export:", err) | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters