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documents.go
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documents.go
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// Copyright 2020 The Moov Authors
// Use of this source code is governed by an Apache License
// license that can be found in the LICENSE file.
package documents
import (
"bufio"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"path"
"strings"
"time"
"github.com/moov-io/base"
moovhttp "github.com/moov-io/base/http"
"github.com/moov-io/customers/pkg/client"
"github.com/moov-io/customers/pkg/documents/storage"
"github.com/moov-io/customers/pkg/route"
"github.com/gorilla/mux"
"github.com/moov-io/base/log"
"gocloud.dev/blob"
"gocloud.dev/secrets"
)
var (
errNoDocumentID = errors.New("no Document ID found")
)
type sizeLimit uint64
func (l sizeLimit) String() string {
return fmt.Sprintf("%dMB", l>>20)
}
const (
maxDocumentSize sizeLimit = 20 << 20 // 20MB
maxFormSize sizeLimit = maxDocumentSize + (5 << 20) // restricts request body size to allow for the document plus a small buffer
)
func AddDocumentRoutes(logger log.Logger, r *mux.Router, repo DocumentRepository, keeper *secrets.Keeper, bucketFactory storage.BucketFunc) {
logger = logger.Set("package", log.String("documents"))
r.Methods("GET").Path("/customers/{customerID}/documents").HandlerFunc(getCustomerDocuments(logger, repo))
r.Methods("POST").Path("/customers/{customerID}/documents").HandlerFunc(uploadCustomerDocument(logger, repo, keeper, bucketFactory))
r.Methods("GET").Path("/customers/{customerID}/documents/{documentID}").HandlerFunc(retrieveRawDocument(logger, repo, keeper, bucketFactory))
r.Methods("DELETE").Path("/customers/{customerID}/documents/{documentID}").HandlerFunc(deleteCustomerDocument(logger, repo))
}
func getDocumentID(w http.ResponseWriter, r *http.Request) string {
v, ok := mux.Vars(r)["documentID"]
if !ok || v == "" {
moovhttp.Problem(w, errNoDocumentID)
return ""
}
return v
}
func getCustomerDocuments(logger log.Logger, repo DocumentRepository) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
w = route.Responder(logger, w, r)
customerID, organization := route.GetCustomerID(w, r), route.GetOrganization(w, r)
if customerID == "" || organization == "" {
return
}
docs, err := repo.getCustomerDocuments(customerID, organization)
if err != nil {
logger.Set("customerID", log.String(customerID)).LogErrorf("failed to get customer document: %v", err)
moovhttp.Problem(w, err)
return
}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(http.StatusOK)
json.NewEncoder(w).Encode(docs)
}
}
func readDocumentType(v string) (string, error) {
orig := v
v = strings.ToLower(strings.TrimSpace(v))
switch v {
case "driverslicense", "passport":
return v, nil
case "utilitybill", "bankstatement":
return v, nil
}
return "", fmt.Errorf("unknown Document type: %s", orig)
}
func uploadCustomerDocument(logger log.Logger, repo DocumentRepository, keeper *secrets.Keeper, bucketFactory storage.BucketFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
w = route.Responder(logger, w, r)
customerID := route.GetCustomerID(w, r)
if customerID == "" {
return
}
logger = logger.Set("customerID", log.String(customerID))
documentType, err := readDocumentType(r.URL.Query().Get("type"))
if err != nil {
moovhttp.Problem(w, err)
return
}
// if r.Body is larger than maxFormSize an error will be returned when the body is read
r.Body = http.MaxBytesReader(w, r.Body, int64(maxFormSize))
file, fileHeader, err := r.FormFile("file")
if err != nil {
if strings.Contains(err.Error(), "request body too large") {
logger.LogErrorf("max form size exceeded: %v", err)
moovhttp.Problem(w, fmt.Errorf("request body exceeds maximum size of %s", maxFormSize))
return
}
logger.LogErrorf("error reading form file: %v", err)
moovhttp.Problem(w, fmt.Errorf("expected multipart upload with key of 'file' error=%v", err))
return
}
defer file.Close()
if fileHeader.Size > int64(maxDocumentSize) {
logger.LogErrorf("failed to peek: %v", err)
moovhttp.Problem(w, fmt.Errorf("file exceeds maximum size of %s", maxDocumentSize))
return
}
fileReader := bufio.NewReader(file)
sniff, err := fileReader.Peek(512)
if err != nil && err != io.EOF {
logger.LogErrorf("peek failed: %v", err)
moovhttp.Problem(w, err)
return
}
contentType := http.DetectContentType(sniff)
// Grab our cloud bucket before writing into our database
bucket, err := bucketFactory()
if err != nil {
logger.LogErrorf("failed to create bucket: %v", err)
moovhttp.Problem(w, err)
return
}
defer bucket.Close()
doc := &client.Document{
DocumentID: base.ID(),
Type: documentType,
ContentType: contentType,
UploadedAt: time.Now(),
}
if err := repo.writeCustomerDocument(customerID, doc); err != nil {
logger.LogErrorf("failed to write customer document: %v", err)
moovhttp.Problem(w, err)
return
}
logger.Logf("uploading document=%s (content-type: %s)", doc.DocumentID, contentType)
// Write our document from the request body
ctx, cancelFn := context.WithTimeout(context.TODO(), 60*time.Second)
defer cancelFn()
fBytes, err := ioutil.ReadAll(fileReader)
if err != nil {
logger.LogErrorf("read failed: %v", err)
moovhttp.Problem(w, err)
return
}
encryptedDoc, err := keeper.Encrypt(ctx, fBytes)
if err != nil {
logger.LogErrorf("failed to encrypt document: %v", err)
moovhttp.Problem(w, fmt.Errorf("file upload error - %v", err))
return
}
documentKey := makeDocumentKey(customerID, doc.DocumentID)
logger.Logf("writing %s", documentKey)
err = bucket.WriteAll(ctx, documentKey, encryptedDoc, &blob.WriterOptions{
ContentDisposition: "inline",
ContentType: contentType,
})
if err != nil {
logger.LogErrorf("problem uploading document: %v", err)
moovhttp.Problem(w, err)
return
}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.WriteHeader(http.StatusOK)
json.NewEncoder(w).Encode(doc)
}
}
func retrieveRawDocument(logger log.Logger, repo DocumentRepository, keeper *secrets.Keeper, bucketFactory storage.BucketFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
w = route.Responder(logger, w, r)
customerID, documentID := route.GetCustomerID(w, r), getDocumentID(w, r)
if customerID == "" || documentID == "" {
return
}
organization := route.GetOrganization(w, r)
if organization == "" {
return
}
logger = logger.Set("customerID", log.String(customerID)).Set("documentID", log.String(documentID))
// reject the request if the document is deleted
if exists, err := repo.exists(customerID, documentID, organization); !exists || err != nil {
if err != nil {
logger.LogErrorf("failed to check document existence: %v", err)
}
http.NotFound(w, r)
return
}
bucket, err := bucketFactory()
if err != nil {
moovhttp.Problem(w, err)
return
}
defer bucket.Close()
ctx, cancelFn := context.WithTimeout(context.TODO(), 10*time.Second)
defer cancelFn()
documentKey := makeDocumentKey(customerID, documentID)
rdr, err := bucket.NewReader(ctx, documentKey, nil)
if err != nil {
moovhttp.Problem(w, fmt.Errorf("read documentID=%s: %v", documentKey, err))
return
}
defer rdr.Close()
encryptedDoc, err := ioutil.ReadAll(rdr)
if err != nil {
logger.LogErrorf("failed reading document from storage bucket: %v", err)
moovhttp.Problem(w, err)
return
}
doc, err := keeper.Decrypt(ctx, encryptedDoc)
if err != nil {
logger.LogErrorf("failed to decrypt document: %v", err)
moovhttp.Problem(w, err)
return
}
w.Header().Set("Content-Type", rdr.ContentType())
w.WriteHeader(http.StatusOK)
if n, err := w.Write(doc); n == 0 || err != nil {
moovhttp.Problem(w, fmt.Errorf("failed writing documentID=%s (bytes read: %d): %v", documentKey, n, err))
return
}
}
}
func deleteCustomerDocument(logger log.Logger, repo DocumentRepository) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
w = route.Responder(logger, w, r)
customerID, documentID := route.GetCustomerID(w, r), getDocumentID(w, r)
if customerID == "" || documentID == "" {
return
}
logger = logger.Set("customerID", log.String(customerID)).Set("documentID", log.String(documentID))
err := repo.deleteCustomerDocument(customerID, documentID)
if err != nil {
logger.LogErrorf("failed to delete document: %v", err)
moovhttp.Problem(w, fmt.Errorf("failed to %v", err))
return
}
logger.Log("successfully deleted document")
w.WriteHeader(http.StatusNoContent)
}
}
func makeDocumentKey(customerID, documentID string) string {
return path.Join("customers", customerID, "documents", documentID)
}