quantum-inspiration / files / qrng.go
qrng.go
e58f6fff 2023-09-06 Pavel Safronov | 1 | package main |
| 2 | ||
| 3 | import ( | |
| 4 | "encoding/json" | |
| 5 | "fmt" | |
| 6 | "io" | |
| 7 | "net/http" | |
| 8 | "os" | |
| 9 | ) | |
| 10 | ||
| 11 | const ( | |
| 12 | qrngApiKeyEnvVar = "ANU_QRNG_KEY" | |
| 13 | ) | |
| 14 | ||
| 15 | type apiResponse struct { | |
| 16 | Success bool `json:"success"` | |
| 17 | Type string `json:"type"` | |
| 18 | Length string `json:"length"` | |
| 19 | Data []uint8 `json:"data"` | |
| 20 | } | |
| 21 | ||
| 22 | func GetRandomNumbers(count int) ([]uint8, error) { | |
| 23 | resp, err := getRandomFromQrng(count) | |
| 24 | if err != nil { | |
| 25 | return nil, err | |
| 26 | } | |
| 27 | return resp.Data, nil | |
| 28 | } | |
| 29 | ||
| 30 | func getRandomFromQrng(count int) (apiResponse, error) { | |
| 31 | API_URL := "https://api.quantumnumbers.anu.edu.au" | |
| 32 | API_KEY, keyFound := os.LookupEnv(qrngApiKeyEnvVar) | |
| 33 | if !keyFound { | |
| 34 | fmt.Printf("Error: API key not found in environment variable %s", qrngApiKeyEnvVar) | |
| 35 | return apiResponse{}, fmt.Errorf("API key not found") | |
| 36 | } | |
| 37 | ||
| 38 | client := &http.Client{} | |
| 39 | req, err := http.NewRequest("GET", fmt.Sprintf("%s?length=%d&type=uint8", API_URL, count), nil) | |
| 40 | if err != nil { | |
| 41 | fmt.Println("Error creating request:", err) | |
| 42 | return apiResponse{}, err | |
| 43 | } | |
| 44 | req.Header.Set("x-api-key", API_KEY) | |
| 45 | ||
| 46 | resp, err := client.Do(req) | |
| 47 | if err != nil { | |
| 48 | fmt.Println("Error executing request:", err) | |
| 49 | return apiResponse{}, err | |
| 50 | } | |
| 51 | defer resp.Body.Close() | |
| 52 | ||
| 53 | body, err := io.ReadAll(resp.Body) | |
| 54 | if err != nil { | |
| 55 | fmt.Println("Error reading response:", err) | |
| 56 | return apiResponse{}, err | |
| 57 | } | |
| 58 | ||
| 59 | var response apiResponse | |
| 60 | err = json.Unmarshal(body, &response) | |
| 61 | if err != nil { | |
| 62 | fmt.Println("Error unmarshalling JSON:", err) | |
| 63 | return apiResponse{}, err | |
| 64 | } | |
| 65 | ||
| 66 | return response, nil | |
| 67 | } |