diff options
Diffstat (limited to 'src/pkg/net/http/request.go')
| -rw-r--r-- | src/pkg/net/http/request.go | 875 |
1 files changed, 0 insertions, 875 deletions
diff --git a/src/pkg/net/http/request.go b/src/pkg/net/http/request.go deleted file mode 100644 index a67092066..000000000 --- a/src/pkg/net/http/request.go +++ /dev/null @@ -1,875 +0,0 @@ -// Copyright 2009 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// HTTP Request reading and parsing. - -package http - -import ( - "bufio" - "bytes" - "crypto/tls" - "errors" - "fmt" - "io" - "io/ioutil" - "mime" - "mime/multipart" - "net/textproto" - "net/url" - "strconv" - "strings" - "sync" -) - -const ( - maxValueLength = 4096 - maxHeaderLines = 1024 - chunkSize = 4 << 10 // 4 KB chunks - defaultMaxMemory = 32 << 20 // 32 MB -) - -// ErrMissingFile is returned by FormFile when the provided file field name -// is either not present in the request or not a file field. -var ErrMissingFile = errors.New("http: no such file") - -// HTTP request parsing errors. -type ProtocolError struct { - ErrorString string -} - -func (err *ProtocolError) Error() string { return err.ErrorString } - -var ( - ErrHeaderTooLong = &ProtocolError{"header too long"} - ErrShortBody = &ProtocolError{"entity body too short"} - ErrNotSupported = &ProtocolError{"feature not supported"} - ErrUnexpectedTrailer = &ProtocolError{"trailer header without chunked transfer encoding"} - ErrMissingContentLength = &ProtocolError{"missing ContentLength in HEAD response"} - ErrNotMultipart = &ProtocolError{"request Content-Type isn't multipart/form-data"} - ErrMissingBoundary = &ProtocolError{"no multipart boundary param in Content-Type"} -) - -type badStringError struct { - what string - str string -} - -func (e *badStringError) Error() string { return fmt.Sprintf("%s %q", e.what, e.str) } - -// Headers that Request.Write handles itself and should be skipped. -var reqWriteExcludeHeader = map[string]bool{ - "Host": true, // not in Header map anyway - "User-Agent": true, - "Content-Length": true, - "Transfer-Encoding": true, - "Trailer": true, -} - -// A Request represents an HTTP request received by a server -// or to be sent by a client. -// -// The field semantics differ slightly between client and server -// usage. In addition to the notes on the fields below, see the -// documentation for Request.Write and RoundTripper. -type Request struct { - // Method specifies the HTTP method (GET, POST, PUT, etc.). - // For client requests an empty string means GET. - Method string - - // URL specifies either the URI being requested (for server - // requests) or the URL to access (for client requests). - // - // For server requests the URL is parsed from the URI - // supplied on the Request-Line as stored in RequestURI. For - // most requests, fields other than Path and RawQuery will be - // empty. (See RFC 2616, Section 5.1.2) - // - // For client requests, the URL's Host specifies the server to - // connect to, while the Request's Host field optionally - // specifies the Host header value to send in the HTTP - // request. - URL *url.URL - - // The protocol version for incoming requests. - // Client requests always use HTTP/1.1. - Proto string // "HTTP/1.0" - ProtoMajor int // 1 - ProtoMinor int // 0 - - // A header maps request lines to their values. - // If the header says - // - // accept-encoding: gzip, deflate - // Accept-Language: en-us - // Connection: keep-alive - // - // then - // - // Header = map[string][]string{ - // "Accept-Encoding": {"gzip, deflate"}, - // "Accept-Language": {"en-us"}, - // "Connection": {"keep-alive"}, - // } - // - // HTTP defines that header names are case-insensitive. - // The request parser implements this by canonicalizing the - // name, making the first character and any characters - // following a hyphen uppercase and the rest lowercase. - // - // For client requests certain headers are automatically - // added and may override values in Header. - // - // See the documentation for the Request.Write method. - Header Header - - // Body is the request's body. - // - // For client requests a nil body means the request has no - // body, such as a GET request. The HTTP Client's Transport - // is responsible for calling the Close method. - // - // For server requests the Request Body is always non-nil - // but will return EOF immediately when no body is present. - // The Server will close the request body. The ServeHTTP - // Handler does not need to. - Body io.ReadCloser - - // ContentLength records the length of the associated content. - // The value -1 indicates that the length is unknown. - // Values >= 0 indicate that the given number of bytes may - // be read from Body. - // For client requests, a value of 0 means unknown if Body is not nil. - ContentLength int64 - - // TransferEncoding lists the transfer encodings from outermost to - // innermost. An empty list denotes the "identity" encoding. - // TransferEncoding can usually be ignored; chunked encoding is - // automatically added and removed as necessary when sending and - // receiving requests. - TransferEncoding []string - - // Close indicates whether to close the connection after - // replying to this request (for servers) or after sending - // the request (for clients). - Close bool - - // For server requests Host specifies the host on which the - // URL is sought. Per RFC 2616, this is either the value of - // the "Host" header or the host name given in the URL itself. - // It may be of the form "host:port". - // - // For client requests Host optionally overrides the Host - // header to send. If empty, the Request.Write method uses - // the value of URL.Host. - Host string - - // Form contains the parsed form data, including both the URL - // field's query parameters and the POST or PUT form data. - // This field is only available after ParseForm is called. - // The HTTP client ignores Form and uses Body instead. - Form url.Values - - // PostForm contains the parsed form data from POST or PUT - // body parameters. - // This field is only available after ParseForm is called. - // The HTTP client ignores PostForm and uses Body instead. - PostForm url.Values - - // MultipartForm is the parsed multipart form, including file uploads. - // This field is only available after ParseMultipartForm is called. - // The HTTP client ignores MultipartForm and uses Body instead. - MultipartForm *multipart.Form - - // Trailer specifies additional headers that are sent after the request - // body. - // - // For server requests the Trailer map initially contains only the - // trailer keys, with nil values. (The client declares which trailers it - // will later send.) While the handler is reading from Body, it must - // not reference Trailer. After reading from Body returns EOF, Trailer - // can be read again and will contain non-nil values, if they were sent - // by the client. - // - // For client requests Trailer must be initialized to a map containing - // the trailer keys to later send. The values may be nil or their final - // values. The ContentLength must be 0 or -1, to send a chunked request. - // After the HTTP request is sent the map values can be updated while - // the request body is read. Once the body returns EOF, the caller must - // not mutate Trailer. - // - // Few HTTP clients, servers, or proxies support HTTP trailers. - Trailer Header - - // RemoteAddr allows HTTP servers and other software to record - // the network address that sent the request, usually for - // logging. This field is not filled in by ReadRequest and - // has no defined format. The HTTP server in this package - // sets RemoteAddr to an "IP:port" address before invoking a - // handler. - // This field is ignored by the HTTP client. - RemoteAddr string - - // RequestURI is the unmodified Request-URI of the - // Request-Line (RFC 2616, Section 5.1) as sent by the client - // to a server. Usually the URL field should be used instead. - // It is an error to set this field in an HTTP client request. - RequestURI string - - // TLS allows HTTP servers and other software to record - // information about the TLS connection on which the request - // was received. This field is not filled in by ReadRequest. - // The HTTP server in this package sets the field for - // TLS-enabled connections before invoking a handler; - // otherwise it leaves the field nil. - // This field is ignored by the HTTP client. - TLS *tls.ConnectionState -} - -// ProtoAtLeast reports whether the HTTP protocol used -// in the request is at least major.minor. -func (r *Request) ProtoAtLeast(major, minor int) bool { - return r.ProtoMajor > major || - r.ProtoMajor == major && r.ProtoMinor >= minor -} - -// UserAgent returns the client's User-Agent, if sent in the request. -func (r *Request) UserAgent() string { - return r.Header.Get("User-Agent") -} - -// Cookies parses and returns the HTTP cookies sent with the request. -func (r *Request) Cookies() []*Cookie { - return readCookies(r.Header, "") -} - -var ErrNoCookie = errors.New("http: named cookie not present") - -// Cookie returns the named cookie provided in the request or -// ErrNoCookie if not found. -func (r *Request) Cookie(name string) (*Cookie, error) { - for _, c := range readCookies(r.Header, name) { - return c, nil - } - return nil, ErrNoCookie -} - -// AddCookie adds a cookie to the request. Per RFC 6265 section 5.4, -// AddCookie does not attach more than one Cookie header field. That -// means all cookies, if any, are written into the same line, -// separated by semicolon. -func (r *Request) AddCookie(c *Cookie) { - s := fmt.Sprintf("%s=%s", sanitizeCookieName(c.Name), sanitizeCookieValue(c.Value)) - if c := r.Header.Get("Cookie"); c != "" { - r.Header.Set("Cookie", c+"; "+s) - } else { - r.Header.Set("Cookie", s) - } -} - -// Referer returns the referring URL, if sent in the request. -// -// Referer is misspelled as in the request itself, a mistake from the -// earliest days of HTTP. This value can also be fetched from the -// Header map as Header["Referer"]; the benefit of making it available -// as a method is that the compiler can diagnose programs that use the -// alternate (correct English) spelling req.Referrer() but cannot -// diagnose programs that use Header["Referrer"]. -func (r *Request) Referer() string { - return r.Header.Get("Referer") -} - -// multipartByReader is a sentinel value. -// Its presence in Request.MultipartForm indicates that parsing of the request -// body has been handed off to a MultipartReader instead of ParseMultipartFrom. -var multipartByReader = &multipart.Form{ - Value: make(map[string][]string), - File: make(map[string][]*multipart.FileHeader), -} - -// MultipartReader returns a MIME multipart reader if this is a -// multipart/form-data POST request, else returns nil and an error. -// Use this function instead of ParseMultipartForm to -// process the request body as a stream. -func (r *Request) MultipartReader() (*multipart.Reader, error) { - if r.MultipartForm == multipartByReader { - return nil, errors.New("http: MultipartReader called twice") - } - if r.MultipartForm != nil { - return nil, errors.New("http: multipart handled by ParseMultipartForm") - } - r.MultipartForm = multipartByReader - return r.multipartReader() -} - -func (r *Request) multipartReader() (*multipart.Reader, error) { - v := r.Header.Get("Content-Type") - if v == "" { - return nil, ErrNotMultipart - } - d, params, err := mime.ParseMediaType(v) - if err != nil || d != "multipart/form-data" { - return nil, ErrNotMultipart - } - boundary, ok := params["boundary"] - if !ok { - return nil, ErrMissingBoundary - } - return multipart.NewReader(r.Body, boundary), nil -} - -// Return value if nonempty, def otherwise. -func valueOrDefault(value, def string) string { - if value != "" { - return value - } - return def -} - -// NOTE: This is not intended to reflect the actual Go version being used. -// It was changed from "Go http package" to "Go 1.1 package http" at the -// time of the Go 1.1 release because the former User-Agent had ended up -// on a blacklist for some intrusion detection systems. -// See https://codereview.appspot.com/7532043. -const defaultUserAgent = "Go 1.1 package http" - -// Write writes an HTTP/1.1 request -- header and body -- in wire format. -// This method consults the following fields of the request: -// Host -// URL -// Method (defaults to "GET") -// Header -// ContentLength -// TransferEncoding -// Body -// -// If Body is present, Content-Length is <= 0 and TransferEncoding -// hasn't been set to "identity", Write adds "Transfer-Encoding: -// chunked" to the header. Body is closed after it is sent. -func (r *Request) Write(w io.Writer) error { - return r.write(w, false, nil) -} - -// WriteProxy is like Write but writes the request in the form -// expected by an HTTP proxy. In particular, WriteProxy writes the -// initial Request-URI line of the request with an absolute URI, per -// section 5.1.2 of RFC 2616, including the scheme and host. -// In either case, WriteProxy also writes a Host header, using -// either r.Host or r.URL.Host. -func (r *Request) WriteProxy(w io.Writer) error { - return r.write(w, true, nil) -} - -// extraHeaders may be nil -func (req *Request) write(w io.Writer, usingProxy bool, extraHeaders Header) error { - host := req.Host - if host == "" { - if req.URL == nil { - return errors.New("http: Request.Write on Request with no Host or URL set") - } - host = req.URL.Host - } - - ruri := req.URL.RequestURI() - if usingProxy && req.URL.Scheme != "" && req.URL.Opaque == "" { - ruri = req.URL.Scheme + "://" + host + ruri - } else if req.Method == "CONNECT" && req.URL.Path == "" { - // CONNECT requests normally give just the host and port, not a full URL. - ruri = host - } - // TODO(bradfitz): escape at least newlines in ruri? - - // Wrap the writer in a bufio Writer if it's not already buffered. - // Don't always call NewWriter, as that forces a bytes.Buffer - // and other small bufio Writers to have a minimum 4k buffer - // size. - var bw *bufio.Writer - if _, ok := w.(io.ByteWriter); !ok { - bw = bufio.NewWriter(w) - w = bw - } - - fmt.Fprintf(w, "%s %s HTTP/1.1\r\n", valueOrDefault(req.Method, "GET"), ruri) - - // Header lines - fmt.Fprintf(w, "Host: %s\r\n", host) - - // Use the defaultUserAgent unless the Header contains one, which - // may be blank to not send the header. - userAgent := defaultUserAgent - if req.Header != nil { - if ua := req.Header["User-Agent"]; len(ua) > 0 { - userAgent = ua[0] - } - } - if userAgent != "" { - fmt.Fprintf(w, "User-Agent: %s\r\n", userAgent) - } - - // Process Body,ContentLength,Close,Trailer - tw, err := newTransferWriter(req) - if err != nil { - return err - } - err = tw.WriteHeader(w) - if err != nil { - return err - } - - err = req.Header.WriteSubset(w, reqWriteExcludeHeader) - if err != nil { - return err - } - - if extraHeaders != nil { - err = extraHeaders.Write(w) - if err != nil { - return err - } - } - - io.WriteString(w, "\r\n") - - // Write body and trailer - err = tw.WriteBody(w) - if err != nil { - return err - } - - if bw != nil { - return bw.Flush() - } - return nil -} - -// ParseHTTPVersion parses a HTTP version string. -// "HTTP/1.0" returns (1, 0, true). -func ParseHTTPVersion(vers string) (major, minor int, ok bool) { - const Big = 1000000 // arbitrary upper bound - switch vers { - case "HTTP/1.1": - return 1, 1, true - case "HTTP/1.0": - return 1, 0, true - } - if !strings.HasPrefix(vers, "HTTP/") { - return 0, 0, false - } - dot := strings.Index(vers, ".") - if dot < 0 { - return 0, 0, false - } - major, err := strconv.Atoi(vers[5:dot]) - if err != nil || major < 0 || major > Big { - return 0, 0, false - } - minor, err = strconv.Atoi(vers[dot+1:]) - if err != nil || minor < 0 || minor > Big { - return 0, 0, false - } - return major, minor, true -} - -// NewRequest returns a new Request given a method, URL, and optional body. -// -// If the provided body is also an io.Closer, the returned -// Request.Body is set to body and will be closed by the Client -// methods Do, Post, and PostForm, and Transport.RoundTrip. -func NewRequest(method, urlStr string, body io.Reader) (*Request, error) { - u, err := url.Parse(urlStr) - if err != nil { - return nil, err - } - rc, ok := body.(io.ReadCloser) - if !ok && body != nil { - rc = ioutil.NopCloser(body) - } - req := &Request{ - Method: method, - URL: u, - Proto: "HTTP/1.1", - ProtoMajor: 1, - ProtoMinor: 1, - Header: make(Header), - Body: rc, - Host: u.Host, - } - if body != nil { - switch v := body.(type) { - case *bytes.Buffer: - req.ContentLength = int64(v.Len()) - case *bytes.Reader: - req.ContentLength = int64(v.Len()) - case *strings.Reader: - req.ContentLength = int64(v.Len()) - } - } - - return req, nil -} - -// SetBasicAuth sets the request's Authorization header to use HTTP -// Basic Authentication with the provided username and password. -// -// With HTTP Basic Authentication the provided username and password -// are not encrypted. -func (r *Request) SetBasicAuth(username, password string) { - r.Header.Set("Authorization", "Basic "+basicAuth(username, password)) -} - -// parseRequestLine parses "GET /foo HTTP/1.1" into its three parts. -func parseRequestLine(line string) (method, requestURI, proto string, ok bool) { - s1 := strings.Index(line, " ") - s2 := strings.Index(line[s1+1:], " ") - if s1 < 0 || s2 < 0 { - return - } - s2 += s1 + 1 - return line[:s1], line[s1+1 : s2], line[s2+1:], true -} - -var textprotoReaderPool sync.Pool - -func newTextprotoReader(br *bufio.Reader) *textproto.Reader { - if v := textprotoReaderPool.Get(); v != nil { - tr := v.(*textproto.Reader) - tr.R = br - return tr - } - return textproto.NewReader(br) -} - -func putTextprotoReader(r *textproto.Reader) { - r.R = nil - textprotoReaderPool.Put(r) -} - -// ReadRequest reads and parses a request from b. -func ReadRequest(b *bufio.Reader) (req *Request, err error) { - - tp := newTextprotoReader(b) - req = new(Request) - - // First line: GET /index.html HTTP/1.0 - var s string - if s, err = tp.ReadLine(); err != nil { - return nil, err - } - defer func() { - putTextprotoReader(tp) - if err == io.EOF { - err = io.ErrUnexpectedEOF - } - }() - - var ok bool - req.Method, req.RequestURI, req.Proto, ok = parseRequestLine(s) - if !ok { - return nil, &badStringError{"malformed HTTP request", s} - } - rawurl := req.RequestURI - if req.ProtoMajor, req.ProtoMinor, ok = ParseHTTPVersion(req.Proto); !ok { - return nil, &badStringError{"malformed HTTP version", req.Proto} - } - - // CONNECT requests are used two different ways, and neither uses a full URL: - // The standard use is to tunnel HTTPS through an HTTP proxy. - // It looks like "CONNECT www.google.com:443 HTTP/1.1", and the parameter is - // just the authority section of a URL. This information should go in req.URL.Host. - // - // The net/rpc package also uses CONNECT, but there the parameter is a path - // that starts with a slash. It can be parsed with the regular URL parser, - // and the path will end up in req.URL.Path, where it needs to be in order for - // RPC to work. - justAuthority := req.Method == "CONNECT" && !strings.HasPrefix(rawurl, "/") - if justAuthority { - rawurl = "http://" + rawurl - } - - if req.URL, err = url.ParseRequestURI(rawurl); err != nil { - return nil, err - } - - if justAuthority { - // Strip the bogus "http://" back off. - req.URL.Scheme = "" - } - - // Subsequent lines: Key: value. - mimeHeader, err := tp.ReadMIMEHeader() - if err != nil { - return nil, err - } - req.Header = Header(mimeHeader) - - // RFC2616: Must treat - // GET /index.html HTTP/1.1 - // Host: www.google.com - // and - // GET http://www.google.com/index.html HTTP/1.1 - // Host: doesntmatter - // the same. In the second case, any Host line is ignored. - req.Host = req.URL.Host - if req.Host == "" { - req.Host = req.Header.get("Host") - } - delete(req.Header, "Host") - - fixPragmaCacheControl(req.Header) - - err = readTransfer(req, b) - if err != nil { - return nil, err - } - - return req, nil -} - -// MaxBytesReader is similar to io.LimitReader but is intended for -// limiting the size of incoming request bodies. In contrast to -// io.LimitReader, MaxBytesReader's result is a ReadCloser, returns a -// non-EOF error for a Read beyond the limit, and Closes the -// underlying reader when its Close method is called. -// -// MaxBytesReader prevents clients from accidentally or maliciously -// sending a large request and wasting server resources. -func MaxBytesReader(w ResponseWriter, r io.ReadCloser, n int64) io.ReadCloser { - return &maxBytesReader{w: w, r: r, n: n} -} - -type maxBytesReader struct { - w ResponseWriter - r io.ReadCloser // underlying reader - n int64 // max bytes remaining - stopped bool -} - -func (l *maxBytesReader) Read(p []byte) (n int, err error) { - if l.n <= 0 { - if !l.stopped { - l.stopped = true - if res, ok := l.w.(*response); ok { - res.requestTooLarge() - } - } - return 0, errors.New("http: request body too large") - } - if int64(len(p)) > l.n { - p = p[:l.n] - } - n, err = l.r.Read(p) - l.n -= int64(n) - return -} - -func (l *maxBytesReader) Close() error { - return l.r.Close() -} - -func copyValues(dst, src url.Values) { - for k, vs := range src { - for _, value := range vs { - dst.Add(k, value) - } - } -} - -func parsePostForm(r *Request) (vs url.Values, err error) { - if r.Body == nil { - err = errors.New("missing form body") - return - } - ct := r.Header.Get("Content-Type") - // RFC 2616, section 7.2.1 - empty type - // SHOULD be treated as application/octet-stream - if ct == "" { - ct = "application/octet-stream" - } - ct, _, err = mime.ParseMediaType(ct) - switch { - case ct == "application/x-www-form-urlencoded": - var reader io.Reader = r.Body - maxFormSize := int64(1<<63 - 1) - if _, ok := r.Body.(*maxBytesReader); !ok { - maxFormSize = int64(10 << 20) // 10 MB is a lot of text. - reader = io.LimitReader(r.Body, maxFormSize+1) - } - b, e := ioutil.ReadAll(reader) - if e != nil { - if err == nil { - err = e - } - break - } - if int64(len(b)) > maxFormSize { - err = errors.New("http: POST too large") - return - } - vs, e = url.ParseQuery(string(b)) - if err == nil { - err = e - } - case ct == "multipart/form-data": - // handled by ParseMultipartForm (which is calling us, or should be) - // TODO(bradfitz): there are too many possible - // orders to call too many functions here. - // Clean this up and write more tests. - // request_test.go contains the start of this, - // in TestParseMultipartFormOrder and others. - } - return -} - -// ParseForm parses the raw query from the URL and updates r.Form. -// -// For POST or PUT requests, it also parses the request body as a form and -// put the results into both r.PostForm and r.Form. -// POST and PUT body parameters take precedence over URL query string values -// in r.Form. -// -// If the request Body's size has not already been limited by MaxBytesReader, -// the size is capped at 10MB. -// -// ParseMultipartForm calls ParseForm automatically. -// It is idempotent. -func (r *Request) ParseForm() error { - var err error - if r.PostForm == nil { - if r.Method == "POST" || r.Method == "PUT" || r.Method == "PATCH" { - r.PostForm, err = parsePostForm(r) - } - if r.PostForm == nil { - r.PostForm = make(url.Values) - } - } - if r.Form == nil { - if len(r.PostForm) > 0 { - r.Form = make(url.Values) - copyValues(r.Form, r.PostForm) - } - var newValues url.Values - if r.URL != nil { - var e error - newValues, e = url.ParseQuery(r.URL.RawQuery) - if err == nil { - err = e - } - } - if newValues == nil { - newValues = make(url.Values) - } - if r.Form == nil { - r.Form = newValues - } else { - copyValues(r.Form, newValues) - } - } - return err -} - -// ParseMultipartForm parses a request body as multipart/form-data. -// The whole request body is parsed and up to a total of maxMemory bytes of -// its file parts are stored in memory, with the remainder stored on -// disk in temporary files. -// ParseMultipartForm calls ParseForm if necessary. -// After one call to ParseMultipartForm, subsequent calls have no effect. -func (r *Request) ParseMultipartForm(maxMemory int64) error { - if r.MultipartForm == multipartByReader { - return errors.New("http: multipart handled by MultipartReader") - } - if r.Form == nil { - err := r.ParseForm() - if err != nil { - return err - } - } - if r.MultipartForm != nil { - return nil - } - - mr, err := r.multipartReader() - if err != nil { - return err - } - - f, err := mr.ReadForm(maxMemory) - if err != nil { - return err - } - for k, v := range f.Value { - r.Form[k] = append(r.Form[k], v...) - } - r.MultipartForm = f - - return nil -} - -// FormValue returns the first value for the named component of the query. -// POST and PUT body parameters take precedence over URL query string values. -// FormValue calls ParseMultipartForm and ParseForm if necessary. -// To access multiple values of the same key use ParseForm. -func (r *Request) FormValue(key string) string { - if r.Form == nil { - r.ParseMultipartForm(defaultMaxMemory) - } - if vs := r.Form[key]; len(vs) > 0 { - return vs[0] - } - return "" -} - -// PostFormValue returns the first value for the named component of the POST -// or PUT request body. URL query parameters are ignored. -// PostFormValue calls ParseMultipartForm and ParseForm if necessary. -func (r *Request) PostFormValue(key string) string { - if r.PostForm == nil { - r.ParseMultipartForm(defaultMaxMemory) - } - if vs := r.PostForm[key]; len(vs) > 0 { - return vs[0] - } - return "" -} - -// FormFile returns the first file for the provided form key. -// FormFile calls ParseMultipartForm and ParseForm if necessary. -func (r *Request) FormFile(key string) (multipart.File, *multipart.FileHeader, error) { - if r.MultipartForm == multipartByReader { - return nil, nil, errors.New("http: multipart handled by MultipartReader") - } - if r.MultipartForm == nil { - err := r.ParseMultipartForm(defaultMaxMemory) - if err != nil { - return nil, nil, err - } - } - if r.MultipartForm != nil && r.MultipartForm.File != nil { - if fhs := r.MultipartForm.File[key]; len(fhs) > 0 { - f, err := fhs[0].Open() - return f, fhs[0], err - } - } - return nil, nil, ErrMissingFile -} - -func (r *Request) expectsContinue() bool { - return hasToken(r.Header.get("Expect"), "100-continue") -} - -func (r *Request) wantsHttp10KeepAlive() bool { - if r.ProtoMajor != 1 || r.ProtoMinor != 0 { - return false - } - return hasToken(r.Header.get("Connection"), "keep-alive") -} - -func (r *Request) wantsClose() bool { - return hasToken(r.Header.get("Connection"), "close") -} - -func (r *Request) closeBody() { - if r.Body != nil { - r.Body.Close() - } -} |