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request.go
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request.go
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package request
import (
"crypto/md5"
"errors"
"fmt"
"github.com/MG-RAST/Shock/shock-server/auth"
"github.com/MG-RAST/Shock/shock-server/conf"
e "github.com/MG-RAST/Shock/shock-server/errors"
"github.com/MG-RAST/Shock/shock-server/logger"
"github.com/MG-RAST/Shock/shock-server/node"
"github.com/MG-RAST/Shock/shock-server/responder"
"github.com/MG-RAST/Shock/shock-server/user"
"github.com/MG-RAST/Shock/shock-server/util"
"github.com/MG-RAST/golib/stretchr/goweb/context"
"hash"
"io"
"math/rand"
"net"
"net/http"
"os"
"strconv"
)
type checkSumCom struct {
buf []byte
n int
checksum string
}
func Log(req *http.Request) {
host, _, _ := net.SplitHostPort(req.RemoteAddr)
// failed attempt to get the host in ipv4
//addrs, _ := net.LookupIP(host)
//fmt.Println(addrs)
suffix := ""
if _, auth := req.Header["Authorization"]; auth {
suffix += " AUTH"
}
if l, has := req.Header["Content-Length"]; has {
suffix += " Content-Length: " + l[0]
}
url := ""
if req.URL.RawQuery != "" {
url = fmt.Sprintf("%s %s?%s", req.Method, req.URL.Path, req.URL.RawQuery)
} else {
url = fmt.Sprintf("%s %s", req.Method, req.URL.Path)
}
logger.Info("access", host+" \""+url+suffix+"\"")
}
func Authenticate(req *http.Request) (u *user.User, err error) {
if _, ok := req.Header["Authorization"]; !ok {
err = errors.New(e.NoAuth)
return
}
header := req.Header.Get("Authorization")
u, err = auth.Authenticate(header)
return
}
func AuthError(err error, ctx context.Context) error {
if err.Error() == e.InvalidAuth {
return responder.RespondWithError(ctx, http.StatusBadRequest, "Invalid authorization header or content")
}
err_msg := "Error at Auth: " + err.Error()
logger.Error(err_msg)
return responder.RespondWithError(ctx, http.StatusInternalServerError, err_msg)
}
// helper function to create a node from an http data post
func DataUpload(r *http.Request) (params map[string]string, files node.FormFiles, err error) {
params = make(map[string]string)
files = make(node.FormFiles)
tmpPath := fmt.Sprintf("%s/temp/%d%d", conf.Conf["data-path"], rand.Int(), rand.Int())
files["upload"] = node.FormFile{Name: "filename", Path: tmpPath, Checksum: make(map[string]string)}
if tmpFile, err := os.Create(tmpPath); err == nil {
defer tmpFile.Close()
md5h := md5.New()
dst := io.MultiWriter(tmpFile, md5h)
if _, err = io.Copy(dst, r.Body); err != nil {
return nil, nil, err
}
files["upload"].Checksum["md5"] = fmt.Sprintf("%x", md5h.Sum(nil))
} else {
return nil, nil, err
}
return
}
// helper function for create & update
func ParseMultipartForm(r *http.Request) (params map[string]string, files node.FormFiles, err error) {
params = make(map[string]string)
files = make(node.FormFiles)
reader, err := r.MultipartReader()
if err != nil {
return
}
tmpPath := ""
for {
if part, err := reader.NextPart(); err == nil {
// params don't have a FileName() and files must have FormName() of either "upload", "attributes", or an integer
if part.FileName() == "" {
if !util.IsValidParamName(part.FormName()) {
return nil, nil, errors.New("invalid param: " + part.FormName())
}
buffer := make([]byte, 32*1024)
n, err := part.Read(buffer)
if n == 0 || err != nil {
break
}
params[part.FormName()] = fmt.Sprintf("%s", buffer[0:n])
} else {
if _, er := strconv.Atoi(part.FormName()); er != nil && !util.IsValidFileName(part.FormName()) {
return nil, nil, errors.New("invalid file param: " + part.FormName())
}
tmpPath = fmt.Sprintf("%s/temp/%d%d", conf.Conf["data-path"], rand.Int(), rand.Int())
files[part.FormName()] = node.FormFile{Name: part.FileName(), Path: tmpPath, Checksum: make(map[string]string)}
if tmpFile, err := os.Create(tmpPath); err == nil {
defer tmpFile.Close()
if part.FormName() == "upload" {
md5h := md5.New()
dst := io.MultiWriter(tmpFile, md5h)
if _, err = io.Copy(dst, part); err != nil {
return nil, nil, err
}
files[part.FormName()].Checksum["md5"] = fmt.Sprintf("%x", md5h.Sum(nil))
} else {
io.Copy(tmpFile, part)
}
} else {
return nil, nil, err
}
}
} else if err.Error() != "EOF" {
return nil, nil, err
} else {
break
}
}
_, hasUpload := files["upload"]
_, hasCopyData := params["copy_data"]
if hasUpload && hasCopyData {
os.Remove(tmpPath)
err = errors.New("Cannot specify upload file path and copy_data node in same request.")
return nil, nil, err
}
return
}
func writeChecksum(f func() hash.Hash, c chan checkSumCom) {
go func() {
h := f()
for {
select {
case b := <-c:
if b.n == 0 {
c <- checkSumCom{checksum: fmt.Sprintf("%x", h.Sum(nil))}
return
} else {
h.Write(b.buf[0:b.n])
}
}
}
}()
}