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package handler
import (
"net/http"
"github.com/spiral/roadrunner/v2/plugins/http/config"
)
// MaxLevel defines maximum tree depth for incoming request data and files.
const MaxLevel = 127
type dataTree map[string]interface{}
type fileTree map[string]interface{}
// parseData parses incoming request body into data tree.
func parseData(r *http.Request) dataTree {
data := make(dataTree)
if r.PostForm != nil {
for k, v := range r.PostForm {
data.push(k, v)
}
}
if r.MultipartForm != nil {
for k, v := range r.MultipartForm.Value {
data.push(k, v)
}
}
return data
}
// pushes value into data tree.
func (d dataTree) push(k string, v []string) {
keys := FetchIndexes(k)
if len(keys) <= MaxLevel {
d.mount(keys, v)
}
}
// mount mounts data tree recursively.
func (d dataTree) mount(i []string, v []string) {
if len(i) == 1 {
// single value context (last element)
d[i[0]] = v[len(v)-1]
return
}
if len(i) == 2 && i[1] == "" {
// non associated array of elements
d[i[0]] = v
return
}
if p, ok := d[i[0]]; ok {
p.(dataTree).mount(i[1:], v)
return
}
d[i[0]] = make(dataTree)
d[i[0]].(dataTree).mount(i[1:], v)
}
// parse incoming dataTree request into JSON (including contentMultipart form dataTree)
func parseUploads(r *http.Request, cfg config.Uploads) *Uploads {
u := &Uploads{
cfg: cfg,
tree: make(fileTree),
list: make([]*FileUpload, 0),
}
for k, v := range r.MultipartForm.File {
files := make([]*FileUpload, 0, len(v))
for _, f := range v {
files = append(files, NewUpload(f))
}
u.list = append(u.list, files...)
u.tree.push(k, files)
}
return u
}
// pushes new file upload into it's proper place.
func (d fileTree) push(k string, v []*FileUpload) {
keys := FetchIndexes(k)
if len(keys) <= MaxLevel {
d.mount(keys, v)
}
}
// mount mounts data tree recursively.
func (d fileTree) mount(i []string, v []*FileUpload) {
if len(i) == 1 {
// single value context
d[i[0]] = v[0]
return
}
if len(i) == 2 && i[1] == "" {
// non associated array of elements
d[i[0]] = v
return
}
if p, ok := d[i[0]]; ok {
p.(fileTree).mount(i[1:], v)
return
}
d[i[0]] = make(fileTree)
d[i[0]].(fileTree).mount(i[1:], v)
}
// FetchIndexes parses input name and splits it into separate indexes list.
func FetchIndexes(s string) []string {
var (
pos int
ch string
keys = make([]string, 1)
)
for _, c := range s {
ch = string(c)
switch ch {
case " ":
// ignore all spaces
continue
case "[":
pos = 1
continue
case "]":
if pos == 1 {
keys = append(keys, "")
}
pos = 2
default:
if pos == 1 || pos == 2 {
keys = append(keys, "")
}
keys[len(keys)-1] += ch
pos = 0
}
}
return keys
}
|
