forked from zhu327/gemini-openai-proxy
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
3 changed files
with
188 additions
and
8 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
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
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| package adapter | ||
|
|
||
| import ( | ||
| "encoding/base64" | ||
| "fmt" | ||
| "io" | ||
| "net/http" | ||
| "strings" | ||
| ) | ||
|
|
||
| func parseImageURL(imageURL string) ([]byte, string, error) { | ||
| if strings.HasPrefix(imageURL, "data:image/") { | ||
| return decodeBase64Image(imageURL) | ||
| } | ||
| return getImageInfoFromURL(imageURL) | ||
| } | ||
|
|
||
| func decodeBase64Image(base64String string) ([]byte, string, error) { | ||
| // Remove the base64 prefix (e.g., "data:image/png;base64,") if present | ||
| base64String = strings.TrimPrefix(base64String, "data:image/") | ||
| index := strings.Index(base64String, ";base64,") | ||
| if index != -1 { | ||
| base64String = base64String[index+len(";base64,"):] | ||
| } | ||
|
|
||
| // Decode base64 string to byte slice | ||
| data, err := base64.StdEncoding.DecodeString(base64String) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
|
|
||
| // get image format | ||
| format, err := getImageFormat(base64String) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
|
|
||
| return data, format, nil | ||
| } | ||
|
|
||
| func getImageFormat(dataURI string) (string, error) { | ||
| // Find the index of "image/" | ||
| startIndex := strings.Index(dataURI, "image/") | ||
| if startIndex == -1 { | ||
| return "", fmt.Errorf("image format not found in data URI") | ||
| } | ||
|
|
||
| // Extract the substring between "image/" and ";" | ||
| startIndex += len("image/") | ||
| endIndex := strings.Index(dataURI[startIndex:], ";") | ||
| if endIndex == -1 { | ||
| return "", fmt.Errorf("image format not found in data URI") | ||
| } | ||
|
|
||
| return dataURI[startIndex : startIndex+endIndex], nil | ||
| } | ||
|
|
||
| func getImageInfoFromURL(url string) ([]byte, string, error) { | ||
| // Make an HTTP GET request to the URL | ||
| response, err := http.Get(url) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
| defer response.Body.Close() | ||
|
|
||
| // Read the response body | ||
| imageData, err := io.ReadAll(response.Body) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
|
|
||
| // Extract image format from the "Content-Type" header | ||
| contentType := response.Header.Get("Content-Type") | ||
| format, err := getImageFormatFromContentType(contentType) | ||
| if err != nil { | ||
| return nil, "", err | ||
| } | ||
|
|
||
| return imageData, format, nil | ||
| } | ||
|
|
||
| func getImageFormatFromContentType(contentType string) (string, error) { | ||
| // Extract image format from the "Content-Type" header | ||
| parts := strings.Split(contentType, "/") | ||
| if len(parts) != 2 { | ||
| return "", fmt.Errorf("invalid Content-Type header") | ||
| } | ||
| return parts[1], nil | ||
| } |