Mount is defined in mount.go
This commit is contained in:
Sasha Koshka
parent
3c7b964cfe
commit
92911cdab4
185
service/mount.go
Normal file
185
service/mount.go
Normal file
@ -0,0 +1,185 @@
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package service
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import "os"
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import "log"
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import "fmt"
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import "net"
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import "errors"
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import "strings"
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import "crypto/tls"
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import "encoding/base64"
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import "hnakra/protocol"
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// M creates a very basic mount with the specified name and description.
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func M (name, description string) Mount {
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return Mount {
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Name: name,
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Description: description,
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}
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}
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// Mount contains generic information common to all mounts.
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type Mount struct {
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// Host specifies the host to mount on. If the host is left empty, it
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// will default to @ (meaning default/any host). The port is entirely up
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// to the router. Maximum length for host portion: 255 bytes
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Host string
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// Path specifies the path to mount on. If the path ends with a /, then
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// all requests under the path will be sent to this service. If there is
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// no trailing /, this service will only recieve requests that match the
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// path exactly (when normalized).
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// Maximum length: 2^16-1 bytes
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Path string
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// Router specifies the host:port of the router to connect to. This
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// defaults to $HNAKRA_ROUTER_HOST:$HNAKRA_ROUTER_PORT if left empty.
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// The default value of these environment variables (if not set) is
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// localhost:2048. If you are giving this service to other people, it is
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// a good idea to leave this empty.
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Router string
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// Name should be set to a human-readable name of the service.
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// Maximum length: 255 bytes
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Name string
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// Description should be set to a human-readable description of what the
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// service does.
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// Maximum length: 255 bytes
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Description string
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// User is an optional string that specifies who is connecting to the
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// router. This can be used by routers in conjunction with the key
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// bytes in order to enforce rules about which service can do what. This
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// defaults to $HNAKRA_USER if left empty. If you are giving this
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// service to other people, it is a good idea to leave this empty.
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// Maximum length: 255 bytes
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User string
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// Key is an optional byte slice that is sent to the router in order for
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// it to authorize the connection. If nil, this defaults to the contents
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// of $HNAKRA_KEY interpreted as base64. Do not embed a key in your
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// code - you should only use this if your service reads the key from a
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// safe source upon startup. In addition to this, If you choose to set
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// the key via the aforementioned enviroment variable, ensure that it
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// can only be read by the service.
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// Maximum length: 255 bytes
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Key []byte
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// TLSConfig is an optional TLS configuration.
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TLSConfig *tls.Config
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idFactory *protocol.IDFactory
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}
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func (mount *Mount) connect (scheme string) (conn net.Conn, err error) {
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log.Println("(i) service", mount.Name)
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mount.idFactory = protocol.NewServiceIDFactory()
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defaultRouterHost := os.Getenv("HNAKRA_ROUTER_HOST")
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if defaultRouterHost == "" {
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defaultRouterHost = "localhost"
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}
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defaultRouterPort := os.Getenv("HNAKRA_ROUTER_PORT")
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if defaultRouterPort == "" {
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defaultRouterPort = "2048"
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}
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// parse router host/port
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routerHost, routerPort, _ := strings.Cut(mount.Router, ":")
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if routerHost == "" {
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routerHost = defaultRouterHost
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}
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if routerPort == "" {
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routerPort = defaultRouterPort
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}
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// get mount point
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host := mount.Host
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if host == "" {
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host = "@"
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}
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if len(host) > 255 {
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return nil, errors.New("mount point host cannot be longer than 255 bytes")
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}
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path := mount.Path
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if path == "" {
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path = "/"
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}
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if len(path) > int(protocol.MaxIntOfSize(2)) {
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return nil, errors.New(fmt.Sprint (
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"mount point path cannot be longer than ",
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protocol.MaxIntOfSize(2), " bytes"))
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}
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// get user
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user := mount.User
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if user == "" {
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user = os.Getenv("HNAKRA_USER")
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}
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if len(user) > 255 {
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return nil, errors.New("user cannot be longer than 255 bytes")
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}
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// get key
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key := mount.Key
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if key == nil {
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key, err = base64.StdEncoding.DecodeString(os.Getenv("HNAKRA_KEY"))
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if err != nil { return nil, err }
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}
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if len(key) > 255 {
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return nil, errors.New("key cannot be longer than 255 bytes")
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}
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// ensure name/description aren't too big
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if len(mount.Name) > 255 {
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return nil, errors.New("service name cannot be longer than 255 bytes")
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}
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if len(mount.Description) > 255 {
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return nil, errors.New("service description cannot be longer than 255 bytes")
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}
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// connect to router
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routerAddr := fmt.Sprint(routerHost, ":", routerPort)
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log.Println("... dialing", routerAddr)
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conn, err = tls.Dial("tcp", routerAddr, mount.TLSConfig)
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if err != nil { return nil, err }
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// log in
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log.Println (
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"... logging in as", user,
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"on", scheme + "://" + host + path)
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err = protocol.MessageLogin {
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ID: mount.idFactory.Next(),
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Version: protocol.Version { Major: 0, Minor: 0 },
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User: user,
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Key: key,
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Name: mount.Name,
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Description: mount.Description,
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Scheme: scheme,
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Host: host,
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Path: path,
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}.Send(conn)
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if err != nil {
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conn.Close()
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return nil, err
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}
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// read status
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message, err := protocol.ReadMessage(conn)
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if err != nil {
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conn.Close()
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return nil, err
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}
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status, ok := message.(protocol.MessageStatus)
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if !ok {
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conn.Close()
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return nil, errors.New(fmt.Sprint("router sent unknown type, expecting", protocol.TypeStatus))
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}
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if status.Status != protocol.StatusOk {
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return nil, status
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}
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log.Println(".// logged in")
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return conn, nil
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}
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@ -1,188 +1,2 @@
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// Package service provides a toolkit for creating Hnakra services.
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package service
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import "os"
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import "log"
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import "fmt"
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import "net"
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import "errors"
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import "strings"
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import "crypto/tls"
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import "encoding/base64"
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import "hnakra/protocol"
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// M creates a very basic mount with the specified name and description.
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func M (name, description string) Mount {
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return Mount {
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Name: name,
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Description: description,
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}
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}
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// Mount contains generic information common to all mounts.
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type Mount struct {
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// Host specifies the host to mount on. If the host is left empty, it
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// will default to @ (meaning default/any host). The port is entirely up
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// to the router. Maximum length for host portion: 255 bytes
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Host string
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// Path specifies the path to mount on. If the path ends with a /, then
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// all requests under the path will be sent to this service. If there is
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// no trailing /, this service will only recieve requests that match the
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// path exactly (when normalized).
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// Maximum length: 2^16-1 bytes
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Path string
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// Router specifies the host:port of the router to connect to. This
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// defaults to $HNAKRA_ROUTER_HOST:$HNAKRA_ROUTER_PORT if left empty.
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// The default value of these environment variables (if not set) is
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// localhost:2048. If you are giving this service to other people, it is
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// a good idea to leave this empty.
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Router string
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// Name should be set to a human-readable name of the service.
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// Maximum length: 255 bytes
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Name string
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// Description should be set to a human-readable description of what the
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// service does.
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// Maximum length: 255 bytes
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Description string
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// User is an optional string that specifies who is connecting to the
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// router. This can be used by routers in conjunction with the key
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// bytes in order to enforce rules about which service can do what. This
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// defaults to $HNAKRA_USER if left empty. If you are giving this
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// service to other people, it is a good idea to leave this empty.
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// Maximum length: 255 bytes
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User string
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// Key is an optional byte slice that is sent to the router in order for
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// it to authorize the connection. If nil, this defaults to the contents
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// of $HNAKRA_KEY interpreted as base64. Do not embed a key in your
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// code - you should only use this if your service reads the key from a
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// safe source upon startup. In addition to this, If you choose to set
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// the key via the aforementioned enviroment variable, ensure that it
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// can only be read by the service.
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// Maximum length: 255 bytes
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Key []byte
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// TLSConfig is an optional TLS configuration.
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TLSConfig *tls.Config
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idFactory *protocol.IDFactory
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}
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func (mount *Mount) connect (scheme string) (conn net.Conn, err error) {
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log.Println("(i) service", mount.Name)
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mount.idFactory = protocol.NewServiceIDFactory()
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defaultRouterHost := os.Getenv("HNAKRA_ROUTER_HOST")
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if defaultRouterHost == "" {
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defaultRouterHost = "localhost"
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}
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defaultRouterPort := os.Getenv("HNAKRA_ROUTER_PORT")
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if defaultRouterPort == "" {
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defaultRouterPort = "2048"
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}
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// parse router host/port
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routerHost, routerPort, _ := strings.Cut(mount.Router, ":")
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if routerHost == "" {
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routerHost = defaultRouterHost
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}
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if routerPort == "" {
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routerPort = defaultRouterPort
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}
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// get mount point
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host := mount.Host
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if host == "" {
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host = "@"
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}
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if len(host) > 255 {
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return nil, errors.New("mount point host cannot be longer than 255 bytes")
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}
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path := mount.Path
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if path == "" {
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path = "/"
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}
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if len(path) > int(protocol.MaxIntOfSize(2)) {
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return nil, errors.New(fmt.Sprint (
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"mount point path cannot be longer than ",
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protocol.MaxIntOfSize(2), " bytes"))
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}
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// get user
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user := mount.User
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if user == "" {
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user = os.Getenv("HNAKRA_USER")
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}
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if len(user) > 255 {
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return nil, errors.New("user cannot be longer than 255 bytes")
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}
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// get key
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key := mount.Key
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if key == nil {
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key, err = base64.StdEncoding.DecodeString(os.Getenv("HNAKRA_KEY"))
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if err != nil { return nil, err }
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}
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if len(key) > 255 {
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return nil, errors.New("key cannot be longer than 255 bytes")
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}
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// ensure name/description aren't too big
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if len(mount.Name) > 255 {
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return nil, errors.New("service name cannot be longer than 255 bytes")
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}
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if len(mount.Description) > 255 {
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return nil, errors.New("service description cannot be longer than 255 bytes")
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}
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// connect to router
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routerAddr := fmt.Sprint(routerHost, ":", routerPort)
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log.Println("... dialing", routerAddr)
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conn, err = tls.Dial("tcp", routerAddr, mount.TLSConfig)
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if err != nil { return nil, err }
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// log in
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log.Println (
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"... logging in as", user,
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"on", scheme + "://" + host + path)
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err = protocol.MessageLogin {
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ID: mount.idFactory.Next(),
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Version: protocol.Version { Major: 0, Minor: 0 },
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User: user,
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Key: key,
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Name: mount.Name,
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Description: mount.Description,
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Scheme: scheme,
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Host: host,
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Path: path,
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}.Send(conn)
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if err != nil {
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conn.Close()
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return nil, err
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}
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// read status
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message, err := protocol.ReadMessage(conn)
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if err != nil {
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conn.Close()
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return nil, err
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}
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status, ok := message.(protocol.MessageStatus)
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if !ok {
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conn.Close()
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return nil, errors.New(fmt.Sprint("router sent unknown type, expecting", protocol.TypeStatus))
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}
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if status.Status != protocol.StatusOk {
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return nil, status
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}
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log.Println(".// logged in")
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return conn, nil
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}
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// TODO: other protocols like gemini, websocket, ftp, etc
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