// memory.
func (r *Reader) ReadForm(maxMemory int64) (*Form, error) {
	return r.readForm(maxMemory)
}

var (
	multipartfiles    = godebug.New("#multipartfiles") // TODO: document and remove #
	multipartmaxparts = godebug.New("multipartmaxparts")
)

func (r *Reader) readForm(maxMemory int64) (_ *Form, err error) {
	form := &Form{make(map[string][]string), make(map[string][]*FileHeader)}
	var (
		file    *os.File
		fileOff int64
	)

	{Name: "jstmpllitinterp", Package: "html/template", Opaque: true}, // bug #66217: remove Opaque
	//{Name: "multipartfiles", Package: "mime/multipart"},
	{Name: "multipartmaxheaders", Package: "mime/multipart"},
	{Name: "multipartmaxparts", Package: "mime/multipart"},
	{Name: "multipathtcp", Package: "net"},
	{Name: "netdns", Package: "net", Opaque: true},
	{Name: "panicnil", Package: "runtime", Changed: 21, Old: "1"},

		{files: 1, extraKeysPerFile: 9998}, // plus Content-Disposition and Content-Type
		{files: 1, extraKeysPerFile: 10000, wantErr: ErrMessageTooLarge},
		{godebug: "multipartmaxparts=100", values: 100},
		{godebug: "multipartmaxparts=100", values: 101, wantErr: ErrMessageTooLarge},
		{godebug: "multipartmaxheaders=100", files: 2, extraKeysPerFile: 48},

FileHeaders to 10000.
These limits may be adjusted with the GODEBUG=multipartmaxheaders=<values>
setting.

Reader.ReadForm further limits the number of parts in a form to 1000.
This limit may be adjusted with the GODEBUG=multipartmaxparts=<value>
setting.
*/
package multipart

import (
	"bufio"
	"bytes"
	"fmt"
	"internal/godebug"
	"io"
	"mime"
	"mime/quotedprintable"
	"net/textproto"
	"path/filepath"
	"strconv"

This behavior was backported to Go 1.19.8+ and Go 1.20.3+.

Go 1.21 introduced a limit on the maximum number of MIME headers and multipart
forms, controlled by the
[`multipartmaxheaders` and `multipartmaxparts` settings](/pkg/mime/multipart#hdr-Limits)
respectively.
This behavior was backported to Go 1.19.8+ and Go 1.20.3+.

Go 1.21 adds the support of Multipath TCP but it is only used if the application

		GODEBUG=multipartmaxheaders=... setting.

	/godebug/non-default-behavior/multipartmaxparts:events
		The number of non-default behaviors executed by
		the mime/multipart package due to a non-default
		GODEBUG=multipartmaxparts=... setting.

	/godebug/non-default-behavior/multipathtcp:events
		The number of non-default behaviors executed by the net package
		due to a non-default GODEBUG=multipathtcp=... setting.