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pdf.go
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pdf.go
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package pdf
import (
"bytes"
"context"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"net/http"
"time"
"github.com/nam-truong-le/lambda-utils-go/v4/pkg/aws/secretsmanager"
"github.com/nam-truong-le/lambda-utils-go/v4/pkg/logger"
)
type Request struct {
Content string `json:"content"`
}
type Response struct {
Base64 string `json:"base64"`
}
func NewFromHTML(ctx context.Context, html string) ([]byte, error) {
log := logger.FromContext(ctx)
toolsURL, err := secretsmanager.GetParameter(ctx, "/external/tools/url")
if err != nil {
return nil, err
}
apiKey, err := secretsmanager.GetParameter(ctx, "/external/tools/apikey")
if err != nil {
return nil, err
}
body := Request{Content: html}
bodyJSON, err := json.Marshal(body)
if err != nil {
return nil, err
}
client := http.Client{Timeout: time.Second * 30}
req, err := http.NewRequest(
http.MethodPost,
fmt.Sprintf("%s/pdf/v1/generate", toolsURL),
bytes.NewReader(bodyJSON),
)
req.Header.Add("X-Api-Key", apiKey)
if err != nil {
return nil, err
}
res, err := client.Do(req)
if err != nil {
return nil, err
}
defer func(Body io.ReadCloser) {
err := Body.Close()
if err != nil {
log.Warnf("Failed to close response body: %s", err)
}
}(res.Body)
if res.StatusCode != http.StatusOK {
log.Errorf("HTTP code: %d", res.StatusCode)
return nil, fmt.Errorf("failed to convert html to pdf, http code: %d", res.StatusCode)
}
resBodyRaw, err := io.ReadAll(res.Body)
if err != nil {
return nil, err
}
resBody := new(Response)
err = json.Unmarshal(resBodyRaw, resBody)
if err != nil {
return nil, err
}
return base64.StdEncoding.DecodeString(resBody.Base64)
}