/
estuary.go
198 lines (172 loc) · 4.51 KB
/
estuary.go
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package service
import (
"bytes"
"encoding/json"
"errors"
"io"
"io/ioutil"
"log"
"mime/multipart"
"net/http"
"os"
"path/filepath"
"github.com/encloud-tech/encloud/pkg/types"
"golang.org/x/net/html"
)
// New func implements the storage interface
func New(config types.ConfYaml) *Estuary {
return &Estuary{
config: config,
}
}
type Estuary struct {
config types.ConfYaml
}
func (e *Estuary) FetchAllContents() types.Contents {
log.Print("Start fetching data from service")
response := e.doApiRequest(
"GET",
e.config.Estuary.BaseApiUrl+"/content/list",
nil,
)
var responseObject types.Contents
json.Unmarshal(response, &responseObject)
log.Print("Data fetched from service: ", responseObject)
return responseObject
}
func (e *Estuary) FetchContentByCid(cid string) types.ByCID {
log.Print("Start fetching data from service")
response := e.doApiRequest(
"GET",
e.config.Estuary.BaseApiUrl+"/content/by-cid/"+cid,
nil,
)
var responseObject types.ByCID
json.Unmarshal(response, &responseObject)
log.Print("Data fetched from service: ", responseObject)
return responseObject
}
func (e *Estuary) UploadContent(filePath string) (types.UploadResponse, error) {
log.Print("Start upload data request")
var responseObject types.UploadResponse
response, err := e.doMultipartApiRequest(
"POST",
e.config.Estuary.UploadApiUrl+"/content/add",
filePath,
)
if err != nil {
return responseObject, err
}
json.Unmarshal(response, &responseObject)
log.Print("Data received from upload request: ", responseObject)
return responseObject, nil
}
func (e *Estuary) DownloadContent(filePath string, cid string, baseUrl string) error {
// Create blank file
f, err := os.OpenFile(filePath, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
return err
}
defer f.Close()
client := &http.Client{}
log.Print("Start download data request")
resp, err := client.Get(baseUrl + "/gw/" + cid)
if err != nil {
return err
}
defer resp.Body.Close()
log.Print("Download data received")
responseData, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
var responseObject types.EstuaryError
json.Unmarshal(responseData, &responseObject)
if resp.StatusCode != 200 || getTitle(resp.Body) == "openresty" || getTitle(resp.Body) == "504 Gateway Time-out" {
return errors.New(responseObject.Error.Details)
} else {
if _, err = f.Write(responseData); err != nil {
return err
}
return nil
}
}
func getTitle(body io.Reader) string {
tkn := html.NewTokenizer(body)
var isTitle bool
var title string
for {
tt := tkn.Next()
switch {
case tt == html.ErrorToken:
return ""
case tt == html.StartTagToken:
t := tkn.Token()
isTitle = t.Data == "title"
case tt == html.TextToken:
t := tkn.Token()
if isTitle {
isTitle = false
title = t.Data
}
return title
}
}
}
func (e *Estuary) doMultipartApiRequest(method string, url string, filePath string) ([]byte, error) {
payload := &bytes.Buffer{}
writer := multipart.NewWriter(payload)
file, _ := os.Open(filePath)
defer file.Close()
part1, _ := writer.CreateFormFile("data", filepath.Base(filePath))
_, _ = io.Copy(part1, file)
err := writer.Close()
if err != nil {
return nil, err
}
client := &http.Client{}
req, err := http.NewRequest(method, url, payload)
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", writer.FormDataContentType())
req.Header.Set("authorization", "Bearer "+e.config.Estuary.Token)
res, err := client.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
var responseObject types.EstuaryUploadResponse
responseData, err := ioutil.ReadAll(res.Body)
if err != nil {
return nil, err
}
json.Unmarshal(responseData, &responseObject)
log.Print("Return api call response: ", string(responseData))
finalResponse, err := json.Marshal(responseObject.Contents[0])
if err != nil {
return nil, err
}
return finalResponse, nil
}
func (e *Estuary) doApiRequest(method string, url string, body io.Reader) []byte {
client := &http.Client{}
req, err := http.NewRequest(method, url, body)
if err != nil {
log.Panic(err.Error())
}
req.Header.Add("Accept", "application/json")
req.Header.Add("Content-Type", "application/json")
req.Header.Add("authorization", "Bearer "+e.config.Estuary.Token)
response, err := client.Do(req)
if err != nil {
log.Panic(err.Error())
}
defer response.Body.Close()
responseData, err := ioutil.ReadAll(response.Body)
if err != nil {
log.Fatal(err)
}
log.Print("Return api call response: ", string(responseData))
return responseData
}