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More refactoring - nearly complete

This commit is contained in:
Matthew Holt 2015-05-04 11:49:49 -06:00
parent 6029973bdc
commit e4fdf171c7
14 changed files with 833 additions and 814 deletions

View file

@ -9,18 +9,47 @@ import (
func init() {
// The parse package must know which directives
// are valid, but it must not import the setup
// or config package.
// or config package. To solve this problem, we
// fill up this map in our init function here.
// The parse package does not need to know the
// ordering of the directives.
for _, dir := range directiveOrder {
parse.ValidDirectives[dir.name] = struct{}{}
}
}
// Directives are registered in the order they should be
// executed. Middleware (directives that inject a handler)
// are executed in the order A-B-C-*-C-B-A, assuming
// they all call the Next handler in the chain.
//
// Ordering is VERY important. Every middleware will
// feel the effects of all other middleware below
// (after) them during a request, but they must not
// care what middleware above them are doing.
//
// For example, log needs to know the status code and
// exactly how many bytes were written to the client,
// which every other middleware can affect, so it gets
// registered first. The errors middleware does not
// care if gzip or log modifies its response, so it
// gets registered below them. Gzip, on the other hand,
// DOES care what errors does to the response since it
// must compress every output to the client, even error
// pages, so it must be registered before the errors
// middleware and any others that would write to the
// response.
var directiveOrder = []directive{
// Essential directives that initialize vital configuration settings
{"root", setup.Root},
{"tls", setup.TLS},
// Other directives that don't create HTTP handlers
{"startup", setup.Startup},
{"shutdown", setup.Shutdown},
{"git", setup.Git},
// Directives that inject handlers (middleware)
{"log", setup.Log},
{"gzip", setup.Gzip},
{"errors", setup.Errors},
@ -31,15 +60,19 @@ var directiveOrder = []directive{
{"basicauth", setup.BasicAuth},
{"proxy", setup.Proxy},
{"fastcgi", setup.FastCGI},
// {"websocket", setup.WebSocket},
// {"markdown", setup.Markdown},
// {"templates", setup.Templates},
// {"browse", setup.Browse},
{"websocket", setup.WebSocket},
{"markdown", setup.Markdown},
{"templates", setup.Templates},
{"browse", setup.Browse},
}
// directive ties together a directive name with its setup function.
type directive struct {
name string
setup setupFunc
}
// A setup function takes a setup controller. Its return values may
// both be nil. If middleware is not nil, it will be chained into
// the HTTP handlers in the order specified in this package.
type setupFunc func(c *setup.Controller) (middleware.Middleware, error)

View file

@ -1,4 +1,83 @@
package browse
package setup
import (
"fmt"
"html/template"
"io/ioutil"
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/browse"
)
// Browse configures a new Browse middleware instance.
func Browse(c *Controller) (middleware.Middleware, error) {
configs, err := browseParse(c)
if err != nil {
return nil, err
}
browse := browse.Browse{
Root: c.Root,
Configs: configs,
}
return func(next middleware.Handler) middleware.Handler {
browse.Next = next
return browse
}, nil
}
func browseParse(c *Controller) ([]browse.Config, error) {
var configs []browse.Config
appendCfg := func(bc browse.Config) error {
for _, c := range configs {
if c.PathScope == bc.PathScope {
return fmt.Errorf("Duplicate browsing config for %s", c.PathScope)
}
}
configs = append(configs, bc)
return nil
}
for c.Next() {
var bc browse.Config
// First argument is directory to allow browsing; default is site root
if c.NextArg() {
bc.PathScope = c.Val()
} else {
bc.PathScope = "/"
}
// Second argument would be the template file to use
var tplText string
if c.NextArg() {
tplBytes, err := ioutil.ReadFile(c.Val())
if err != nil {
return configs, err
}
tplText = string(tplBytes)
} else {
tplText = defaultTemplate
}
// Build the template
tpl, err := template.New("listing").Parse(tplText)
if err != nil {
return configs, err
}
bc.Template = tpl
// Save configuration
err = appendCfg(bc)
if err != nil {
return configs, err
}
}
return configs, nil
}
// The default template to use when serving up directory listings
const defaultTemplate = `<!DOCTYPE html>

171
config/setup/git.go Normal file
View file

@ -0,0 +1,171 @@
package setup
import (
"fmt"
"log"
"net/url"
"path/filepath"
"runtime"
"strconv"
"strings"
"time"
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/git"
)
// Git configures a new Git service routine.
func Git(c *Controller) (middleware.Middleware, error) {
repo, err := gitParse(c)
if err != nil {
return nil, err
}
c.Startup = append(c.Startup, func() error {
// Startup functions are blocking; start
// service routine in background
go func() {
for {
time.Sleep(repo.Interval)
err := repo.Pull()
if err != nil {
if git.Logger == nil {
log.Println(err)
} else {
git.Logger.Println(err)
}
}
}
}()
// Do a pull right away to return error
return repo.Pull()
})
return nil, err
}
func gitParse(c *Controller) (*git.Repo, error) {
repo := &git.Repo{Branch: "master", Interval: git.DefaultInterval, Path: c.Root}
for c.Next() {
args := c.RemainingArgs()
switch len(args) {
case 2:
repo.Path = filepath.Clean(c.Root + string(filepath.Separator) + args[1])
fallthrough
case 1:
repo.Url = args[0]
}
for c.NextBlock() {
switch c.Val() {
case "repo":
if !c.NextArg() {
return nil, c.ArgErr()
}
repo.Url = c.Val()
case "path":
if !c.NextArg() {
return nil, c.ArgErr()
}
repo.Path = filepath.Clean(c.Root + string(filepath.Separator) + c.Val())
case "branch":
if !c.NextArg() {
return nil, c.ArgErr()
}
repo.Branch = c.Val()
case "key":
if !c.NextArg() {
return nil, c.ArgErr()
}
repo.KeyPath = c.Val()
case "interval":
if !c.NextArg() {
return nil, c.ArgErr()
}
t, _ := strconv.Atoi(c.Val())
if t > 0 {
repo.Interval = time.Duration(t) * time.Second
}
case "then":
thenArgs := c.RemainingArgs()
if len(thenArgs) == 0 {
return nil, c.ArgErr()
}
repo.Then = strings.Join(thenArgs, " ")
}
}
}
// if repo is not specified, return error
if repo.Url == "" {
return nil, c.ArgErr()
}
// if private key is not specified, convert repository url to https
// to avoid ssh authentication
// else validate git url
// Note: private key support not yet available on Windows
var err error
if repo.KeyPath == "" {
repo.Url, repo.Host, err = sanitizeHttp(repo.Url)
} else {
repo.Url, repo.Host, err = sanitizeGit(repo.Url)
// TODO add Windows support for private repos
if runtime.GOOS == "windows" {
return nil, fmt.Errorf("Private repository not yet supported on Windows")
}
}
if err != nil {
return nil, err
}
// validate git availability in PATH
if err = git.InitGit(); err != nil {
return nil, err
}
return repo, repo.Prepare()
}
// sanitizeHttp cleans up repository url and converts to https format
// if currently in ssh format.
// Returns sanitized url, hostName (e.g. github.com, bitbucket.com)
// and possible error
func sanitizeHttp(repoUrl string) (string, string, error) {
url, err := url.Parse(repoUrl)
if err != nil {
return "", "", err
}
if url.Host == "" && strings.HasPrefix(url.Path, "git@") {
url.Path = url.Path[len("git@"):]
i := strings.Index(url.Path, ":")
if i < 0 {
return "", "", fmt.Errorf("Invalid git url %s", repoUrl)
}
url.Host = url.Path[:i]
url.Path = "/" + url.Path[i+1:]
}
repoUrl = "https://" + url.Host + url.Path
return repoUrl, url.Host, nil
}
// sanitizeGit cleans up repository url and validate ssh format.
// Returns sanitized url, hostName (e.g. github.com, bitbucket.com)
// and possible error
func sanitizeGit(repoUrl string) (string, string, error) {
repoUrl = strings.TrimSpace(repoUrl)
if !strings.HasPrefix(repoUrl, "git@") || strings.Index(repoUrl, ":") < len("git@a:") {
return "", "", fmt.Errorf("Invalid git url %s", repoUrl)
}
hostUrl := repoUrl[len("git@"):]
i := strings.Index(hostUrl, ":")
host := hostUrl[:i]
return repoUrl, host, nil
}

74
config/setup/markdown.go Normal file
View file

@ -0,0 +1,74 @@
package setup
import (
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/markdown"
"github.com/russross/blackfriday"
)
// Markdown configures a new Markdown middleware instance.
func Markdown(c *Controller) (middleware.Middleware, error) {
mdconfigs, err := markdownParse(c)
if err != nil {
return nil, err
}
md := markdown.Markdown{
Root: c.Root,
Configs: mdconfigs,
}
return func(next middleware.Handler) middleware.Handler {
md.Next = next
return md
}, nil
}
func markdownParse(c *Controller) ([]markdown.Config, error) {
var mdconfigs []markdown.Config
for c.Next() {
md := markdown.Config{
Renderer: blackfriday.HtmlRenderer(0, "", ""),
}
// Get the path scope
if !c.NextArg() || c.Val() == "{" {
return mdconfigs, c.ArgErr()
}
md.PathScope = c.Val()
// Load any other configuration parameters
for c.NextBlock() {
switch c.Val() {
case "ext":
exts := c.RemainingArgs()
if len(exts) == 0 {
return mdconfigs, c.ArgErr()
}
md.Extensions = append(md.Extensions, exts...)
case "css":
if !c.NextArg() {
return mdconfigs, c.ArgErr()
}
md.Styles = append(md.Styles, c.Val())
case "js":
if !c.NextArg() {
return mdconfigs, c.ArgErr()
}
md.Scripts = append(md.Scripts, c.Val())
default:
return mdconfigs, c.Err("Expected valid markdown configuration property")
}
}
// If no extensions were specified, assume .md
if len(md.Extensions) == 0 {
md.Extensions = []string{".md"}
}
mdconfigs = append(mdconfigs, md)
}
return mdconfigs, nil
}

54
config/setup/templates.go Normal file
View file

@ -0,0 +1,54 @@
package setup
import (
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/templates"
)
// Templates configures a new Templates middleware instance.
func Templates(c *Controller) (middleware.Middleware, error) {
rules, err := templatesParse(c)
if err != nil {
return nil, err
}
tmpls := templates.Templates{
Root: c.Root,
Rules: rules,
}
return func(next middleware.Handler) middleware.Handler {
tmpls.Next = next
return tmpls
}, nil
}
func templatesParse(c *Controller) ([]templates.Rule, error) {
var rules []templates.Rule
for c.Next() {
var rule templates.Rule
if c.NextArg() {
// First argument would be the path
rule.Path = c.Val()
// Any remaining arguments are extensions
rule.Extensions = c.RemainingArgs()
if len(rule.Extensions) == 0 {
rule.Extensions = defaultExtensions
}
} else {
rule.Path = defaultPath
rule.Extensions = defaultExtensions
}
rules = append(rules, rule)
}
return rules, nil
}
const defaultPath = "/"
var defaultExtensions = []string{".html", ".htm", ".txt"}

82
config/setup/websocket.go Normal file
View file

@ -0,0 +1,82 @@
package setup
import (
"github.com/mholt/caddy/middleware"
"github.com/mholt/caddy/middleware/websockets"
)
// WebSocket configures a new WebSockets middleware instance.
func WebSocket(c *Controller) (middleware.Middleware, error) {
var websocks []websockets.Config
var respawn bool
optionalBlock := func() (hadBlock bool, err error) {
for c.NextBlock() {
hadBlock = true
if c.Val() == "respawn" {
respawn = true
} else {
return true, c.Err("Expected websocket configuration parameter in block")
}
}
return
}
for c.Next() {
var val, path, command string
// Path or command; not sure which yet
if !c.NextArg() {
return nil, c.ArgErr()
}
val = c.Val()
// Extra configuration may be in a block
hadBlock, err := optionalBlock()
if err != nil {
return nil, err
}
if !hadBlock {
// The next argument on this line will be the command or an open curly brace
if c.NextArg() {
path = val
command = c.Val()
} else {
path = "/"
command = val
}
// Okay, check again for optional block
hadBlock, err = optionalBlock()
if err != nil {
return nil, err
}
}
// Split command into the actual command and its arguments
cmd, args, err := middleware.SplitCommandAndArgs(command)
if err != nil {
return nil, err
}
websocks = append(websocks, websockets.Config{
Path: path,
Command: cmd,
Arguments: args,
Respawn: respawn, // TODO: This isn't used currently
})
}
websockets.GatewayInterface = envGatewayInterface
websockets.ServerSoftware = envServerSoftware
return func(next middleware.Handler) middleware.Handler {
return websockets.WebSockets{Next: next, Sockets: websocks}
}, nil
}
const (
envGatewayInterface = "caddy-CGI/1.1"
envServerSoftware = "caddy/" // TODO: Version
)

View file

@ -4,9 +4,7 @@ package browse
import (
"bytes"
"fmt"
"html/template"
"io/ioutil"
"net/http"
"net/url"
"os"
@ -23,11 +21,11 @@ import (
type Browse struct {
Next middleware.Handler
Root string
Configs []BrowseConfig
Configs []Config
}
// BrowseConfig is a configuration for browsing in a particular path.
type BrowseConfig struct {
// Config is a configuration for browsing in a particular path.
type Config struct {
PathScope string
Template *template.Template
}
@ -72,24 +70,6 @@ var IndexPages = []string{
"default.htm",
}
// New creates a new instance of browse middleware.
func New(c middleware.Controller) (middleware.Middleware, error) {
configs, err := parse(c)
if err != nil {
return nil, err
}
browse := Browse{
Root: c.Root(),
Configs: configs,
}
return func(next middleware.Handler) middleware.Handler {
browse.Next = next
return browse
}, nil
}
// ServeHTTP implements the middleware.Handler interface.
func (b Browse) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
filename := b.Root + r.URL.Path
@ -196,56 +176,3 @@ func (b Browse) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
// Didn't qualify; pass-thru
return b.Next.ServeHTTP(w, r)
}
// parse returns a list of browsing configurations
func parse(c middleware.Controller) ([]BrowseConfig, error) {
var configs []BrowseConfig
appendCfg := func(bc BrowseConfig) error {
for _, c := range configs {
if c.PathScope == bc.PathScope {
return fmt.Errorf("Duplicate browsing config for %s", c.PathScope)
}
}
configs = append(configs, bc)
return nil
}
for c.Next() {
var bc BrowseConfig
// First argument is directory to allow browsing; default is site root
if c.NextArg() {
bc.PathScope = c.Val()
} else {
bc.PathScope = "/"
}
// Second argument would be the template file to use
var tplText string
if c.NextArg() {
tplBytes, err := ioutil.ReadFile(c.Val())
if err != nil {
return configs, err
}
tplText = string(tplBytes)
} else {
tplText = defaultTemplate
}
// Build the template
tpl, err := template.New("listing").Parse(tplText)
if err != nil {
return configs, err
}
bc.Template = tpl
// Save configuration
err = appendCfg(bc)
if err != nil {
return configs, err
}
}
return configs, nil
}

View file

@ -1,8 +1,9 @@
// Package extension is middleware for clean URLs. The root path
// of the site is passed in as well as possible extensions to try
// internally for paths requested that don't match an existing
// resource. The first path+ext combination that matches a valid
// file will be used.
// Package extension is middleware for clean URLs.
//
// The root path of the site is passed in as well as possible extensions
// to try internally for paths requested that don't match an existing
// resource. The first path+ext combination that matches a valid file
// will be used.
package extensions
import (
@ -14,25 +15,6 @@ import (
"github.com/mholt/caddy/middleware"
)
// New creates a new instance of middleware that assumes extensions
// so the site can use cleaner, extensionless URLs
func New(c middleware.Controller) (middleware.Middleware, error) {
root := c.Root()
extensions, err := parse(c)
if err != nil {
return nil, err
}
return func(next middleware.Handler) middleware.Handler {
return Ext{
Next: next,
Extensions: extensions,
Root: root,
}
}, nil
}
// Ext can assume an extension from clean URLs.
// It tries extensions in the order listed in Extensions.
type Ext struct {
@ -60,25 +42,6 @@ func (e Ext) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
return e.Next.ServeHTTP(w, r)
}
// parse sets up an instance of extension middleware
// from a middleware controller and returns a list of extensions.
func parse(c middleware.Controller) ([]string, error) {
var extensions []string
for c.Next() {
// At least one extension is required
if !c.NextArg() {
return extensions, c.ArgErr()
}
extensions = append(extensions, c.Val())
// Tack on any other extensions that may have been listed
extensions = append(extensions, c.RemainingArgs()...)
}
return extensions, nil
}
// resourceExists returns true if the file specified at
// root + path exists; false otherwise.
func resourceExists(root, path string) bool {

View file

@ -1,178 +1,36 @@
package git
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"net/url"
"os"
"path/filepath"
"runtime"
"strconv"
"os/exec"
"strings"
"sync"
"time"
"github.com/mholt/caddy/middleware"
)
// DefaultInterval is the minimum interval to delay before
// requesting another git pull
const DefaultInterval time.Duration = time.Hour * 1
// Number of retries if git pull fails
const numRetries = 3
// gitBinary holds the absolute path to git executable
var gitBinary string
// initMutex prevents parallel attempt to validate
// git availability in PATH
var initMutex sync.Mutex = sync.Mutex{}
// Logger is used to log errors; if nil, the default log.Logger is used.
var Logger *log.Logger
// New creates a new instance of git middleware.
func New(c middleware.Controller) (middleware.Middleware, error) {
repo, err := parse(c)
if err != nil {
return nil, err
}
c.Startup(func() error {
// Startup functions are blocking; start
// service routine in background
go func() {
for {
time.Sleep(repo.Interval)
err := repo.Pull()
if err != nil {
if Logger == nil {
log.Println(err)
} else {
Logger.Println(err)
}
}
}
}()
// Do a pull right away to return error
return repo.Pull()
})
return nil, err
}
func parse(c middleware.Controller) (*Repo, error) {
repo := &Repo{Branch: "master", Interval: DefaultInterval, Path: c.Root()}
for c.Next() {
args := c.RemainingArgs()
switch len(args) {
case 2:
repo.Path = filepath.Clean(c.Root() + string(filepath.Separator) + args[1])
fallthrough
case 1:
repo.Url = args[0]
}
for c.NextBlock() {
switch c.Val() {
case "repo":
if !c.NextArg() {
return nil, c.ArgErr()
}
repo.Url = c.Val()
case "path":
if !c.NextArg() {
return nil, c.ArgErr()
}
repo.Path = filepath.Clean(c.Root() + string(filepath.Separator) + c.Val())
case "branch":
if !c.NextArg() {
return nil, c.ArgErr()
}
repo.Branch = c.Val()
case "key":
if !c.NextArg() {
return nil, c.ArgErr()
}
repo.KeyPath = c.Val()
case "interval":
if !c.NextArg() {
return nil, c.ArgErr()
}
t, _ := strconv.Atoi(c.Val())
if t > 0 {
repo.Interval = time.Duration(t) * time.Second
}
case "then":
thenArgs := c.RemainingArgs()
if len(thenArgs) == 0 {
return nil, c.ArgErr()
}
repo.Then = strings.Join(thenArgs, " ")
}
}
}
// if repo is not specified, return error
if repo.Url == "" {
return nil, c.ArgErr()
}
// if private key is not specified, convert repository url to https
// to avoid ssh authentication
// else validate git url
// Note: private key support not yet available on Windows
var err error
if repo.KeyPath == "" {
repo.Url, repo.Host, err = sanitizeHttp(repo.Url)
} else {
repo.Url, repo.Host, err = sanitizeGit(repo.Url)
// TODO add Windows support for private repos
if runtime.GOOS == "windows" {
return nil, fmt.Errorf("Private repository not yet supported on Windows")
}
}
if err != nil {
return nil, err
}
// validate git availability in PATH
if err = initGit(); err != nil {
return nil, err
}
return repo, repo.prepare()
}
// sanitizeHttp cleans up repository url and converts to https format
// if currently in ssh format.
// Returns sanitized url, hostName (e.g. github.com, bitbucket.com)
// and possible error
func sanitizeHttp(repoUrl string) (string, string, error) {
url, err := url.Parse(repoUrl)
if err != nil {
return "", "", err
}
if url.Host == "" && strings.HasPrefix(url.Path, "git@") {
url.Path = url.Path[len("git@"):]
i := strings.Index(url.Path, ":")
if i < 0 {
return "", "", fmt.Errorf("Invalid git url %s", repoUrl)
}
url.Host = url.Path[:i]
url.Path = "/" + url.Path[i+1:]
}
repoUrl = "https://" + url.Host + url.Path
return repoUrl, url.Host, nil
}
// sanitizeGit cleans up repository url and validate ssh format.
// Returns sanitized url, hostName (e.g. github.com, bitbucket.com)
// and possible error
func sanitizeGit(repoUrl string) (string, string, error) {
repoUrl = strings.TrimSpace(repoUrl)
if !strings.HasPrefix(repoUrl, "git@") || strings.Index(repoUrl, ":") < len("git@a:") {
return "", "", fmt.Errorf("Invalid git url %s", repoUrl)
}
hostUrl := repoUrl[len("git@"):]
i := strings.Index(hostUrl, ":")
host := hostUrl[:i]
return repoUrl, host, nil
}
// logger is an helper function to retrieve the available logger
func logger() *log.Logger {
if Logger == nil {
@ -180,3 +38,302 @@ func logger() *log.Logger {
}
return Logger
}
// Repo is the structure that holds required information
// of a git repository.
type Repo struct {
Url string // Repository URL
Path string // Directory to pull to
Host string // Git domain host e.g. github.com
Branch string // Git branch
KeyPath string // Path to private ssh key
Interval time.Duration // Interval between pulls
Then string // Command to execute after successful git pull
pulled bool // true if there was a successful pull
lastPull time.Time // time of the last successful pull
lastCommit string // hash for the most recent commit
sync.Mutex
}
// Pull attempts a git clone.
// It retries at most numRetries times if error occurs
func (r *Repo) Pull() error {
r.Lock()
defer r.Unlock()
// if it is less than interval since last pull, return
if time.Since(r.lastPull) <= r.Interval {
return nil
}
// keep last commit hash for comparison later
lastCommit := r.lastCommit
var err error
// Attempt to pull at most numRetries times
for i := 0; i < numRetries; i++ {
if err = r.pull(); err == nil {
break
}
logger().Println(err)
}
if err != nil {
return err
}
// check if there are new changes,
// then execute post pull command
if r.lastCommit == lastCommit {
logger().Println("No new changes.")
return nil
}
return r.postPullCommand()
}
// Pull performs git clone, or git pull if repository exists
func (r *Repo) pull() error {
params := []string{"clone", "-b", r.Branch, r.Url, r.Path}
if r.pulled {
params = []string{"pull", "origin", r.Branch}
}
// if key is specified, pull using ssh key
if r.KeyPath != "" {
return r.pullWithKey(params)
}
dir := ""
if r.pulled {
dir = r.Path
}
var err error
if err = runCmd(gitBinary, params, dir); err == nil {
r.pulled = true
r.lastPull = time.Now()
logger().Printf("%v pulled.\n", r.Url)
r.lastCommit, err = r.getMostRecentCommit()
}
return err
}
// pullWithKey is used for private repositories and requires an ssh key.
// Note: currently only limited to Linux and OSX.
func (r *Repo) pullWithKey(params []string) error {
var gitSsh, script *os.File
// ensure temporary files deleted after usage
defer func() {
if gitSsh != nil {
os.Remove(gitSsh.Name())
}
if script != nil {
os.Remove(script.Name())
}
}()
var err error
// write git.sh script to temp file
gitSsh, err = writeScriptFile(gitWrapperScript(gitBinary))
if err != nil {
return err
}
// write git clone bash script to file
script, err = writeScriptFile(bashScript(gitSsh.Name(), r, params))
if err != nil {
return err
}
dir := ""
if r.pulled {
dir = r.Path
}
if err = runCmd(script.Name(), nil, dir); err == nil {
r.pulled = true
r.lastPull = time.Now()
logger().Printf("%v pulled.\n", r.Url)
r.lastCommit, err = r.getMostRecentCommit()
}
return err
}
// Prepare prepares for a git pull
// and validates the configured directory
func (r *Repo) Prepare() error {
// check if directory exists or is empty
// if not, create directory
fs, err := ioutil.ReadDir(r.Path)
if err != nil || len(fs) == 0 {
return os.MkdirAll(r.Path, os.FileMode(0755))
}
// validate git repo
isGit := false
for _, f := range fs {
if f.IsDir() && f.Name() == ".git" {
isGit = true
break
}
}
if isGit {
// check if same repository
var repoUrl string
if repoUrl, err = r.getRepoUrl(); err == nil && repoUrl == r.Url {
r.pulled = true
return nil
}
if err != nil {
return fmt.Errorf("Cannot retrieve repo url for %v Error: %v", r.Path, err)
}
return fmt.Errorf("Another git repo '%v' exists at %v", repoUrl, r.Path)
}
return fmt.Errorf("Cannot git clone into %v, directory not empty.", r.Path)
}
// getMostRecentCommit gets the hash of the most recent commit to the
// repository. Useful for checking if changes occur.
func (r *Repo) getMostRecentCommit() (string, error) {
command := gitBinary + ` --no-pager log -n 1 --pretty=format:"%H"`
c, args, err := middleware.SplitCommandAndArgs(command)
if err != nil {
return "", err
}
return runCmdOutput(c, args, r.Path)
}
// getRepoUrl retrieves remote origin url for the git repository at path
func (r *Repo) getRepoUrl() (string, error) {
_, err := os.Stat(r.Path)
if err != nil {
return "", err
}
args := []string{"config", "--get", "remote.origin.url"}
return runCmdOutput(gitBinary, args, r.Path)
}
// postPullCommand executes r.Then.
// It is trigged after successful git pull
func (r *Repo) postPullCommand() error {
if r.Then == "" {
return nil
}
c, args, err := middleware.SplitCommandAndArgs(r.Then)
if err != nil {
return err
}
if err = runCmd(c, args, r.Path); err == nil {
logger().Printf("Command %v successful.\n", r.Then)
}
return err
}
// InitGit validates git installation and locates the git executable
// binary in PATH
func InitGit() error {
// prevent concurrent call
initMutex.Lock()
defer initMutex.Unlock()
// if validation has been done before and binary located in
// PATH, return.
if gitBinary != "" {
return nil
}
// locate git binary in path
var err error
gitBinary, err = exec.LookPath("git")
return err
}
// runCmd is a helper function to run commands.
// It runs command with args from directory at dir.
// The executed process outputs to os.Stderr
func runCmd(command string, args []string, dir string) error {
cmd := exec.Command(command, args...)
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stderr
cmd.Dir = dir
if err := cmd.Start(); err != nil {
return err
}
return cmd.Wait()
}
// runCmdOutput is a helper function to run commands and return output.
// It runs command with args from directory at dir.
// If successful, returns output and nil error
func runCmdOutput(command string, args []string, dir string) (string, error) {
cmd := exec.Command(command, args...)
cmd.Dir = dir
var err error
if output, err := cmd.Output(); err == nil {
return string(bytes.TrimSpace(output)), nil
}
return "", err
}
// writeScriptFile writes content to a temporary file.
// It changes the temporary file mode to executable and
// closes it to prepare it for execution.
func writeScriptFile(content []byte) (file *os.File, err error) {
if file, err = ioutil.TempFile("", "caddy"); err != nil {
return nil, err
}
if _, err = file.Write(content); err != nil {
return nil, err
}
if err = file.Chmod(os.FileMode(0755)); err != nil {
return nil, err
}
return file, file.Close()
}
// gitWrapperScript forms content for git.sh script
var gitWrapperScript = func(gitBinary string) []byte {
return []byte(fmt.Sprintf(`#!/bin/bash
# The MIT License (MIT)
# Copyright (c) 2013 Alvin Abad
if [ $# -eq 0 ]; then
echo "Git wrapper script that can specify an ssh-key file
Usage:
git.sh -i ssh-key-file git-command
"
exit 1
fi
# remove temporary file on exit
trap 'rm -f /tmp/.git_ssh.$$' 0
if [ "$1" = "-i" ]; then
SSH_KEY=$2; shift; shift
echo "ssh -i $SSH_KEY \$@" > /tmp/.git_ssh.$$
chmod +x /tmp/.git_ssh.$$
export GIT_SSH=/tmp/.git_ssh.$$
fi
# in case the git command is repeated
[ "$1" = "git" ] && shift
# Run the git command
%v "$@"
`, gitBinary))
}
// bashScript forms content of bash script to clone or update a repo using ssh
var bashScript = func(gitShPath string, repo *Repo, params []string) []byte {
return []byte(fmt.Sprintf(`#!/bin/bash
mkdir -p ~/.ssh;
touch ~/.ssh/known_hosts;
ssh-keyscan -t rsa,dsa %v 2>&1 | sort -u - ~/.ssh/known_hosts > ~/.ssh/tmp_hosts;
cat ~/.ssh/tmp_hosts >> ~/.ssh/known_hosts;
%v -i %v %v;
`, repo.Host, gitShPath, repo.KeyPath, strings.Join(params, " ")))
}

View file

@ -1,328 +0,0 @@
package git
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"os/exec"
"strings"
"sync"
"time"
"github.com/mholt/caddy/middleware"
)
// DefaultInterval is the minimum interval to delay before
// requesting another git pull
const DefaultInterval time.Duration = time.Hour * 1
// Number of retries if git pull fails
const numRetries = 3
// gitBinary holds the absolute path to git executable
var gitBinary string
// initMutex prevents parallel attempt to validate
// git availability in PATH
var initMutex sync.Mutex = sync.Mutex{}
// Repo is the structure that holds required information
// of a git repository.
type Repo struct {
Url string // Repository URL
Path string // Directory to pull to
Host string // Git domain host e.g. github.com
Branch string // Git branch
KeyPath string // Path to private ssh key
Interval time.Duration // Interval between pulls
Then string // Command to execute after successful git pull
pulled bool // true if there was a successful pull
lastPull time.Time // time of the last successful pull
lastCommit string // hash for the most recent commit
sync.Mutex
}
// Pull attempts a git clone.
// It retries at most numRetries times if error occurs
func (r *Repo) Pull() error {
r.Lock()
defer r.Unlock()
// if it is less than interval since last pull, return
if time.Since(r.lastPull) <= r.Interval {
return nil
}
// keep last commit hash for comparison later
lastCommit := r.lastCommit
var err error
// Attempt to pull at most numRetries times
for i := 0; i < numRetries; i++ {
if err = r.pull(); err == nil {
break
}
logger().Println(err)
}
if err != nil {
return err
}
// check if there are new changes,
// then execute post pull command
if r.lastCommit == lastCommit {
logger().Println("No new changes.")
return nil
}
return r.postPullCommand()
}
// Pull performs git clone, or git pull if repository exists
func (r *Repo) pull() error {
params := []string{"clone", "-b", r.Branch, r.Url, r.Path}
if r.pulled {
params = []string{"pull", "origin", r.Branch}
}
// if key is specified, pull using ssh key
if r.KeyPath != "" {
return r.pullWithKey(params)
}
dir := ""
if r.pulled {
dir = r.Path
}
var err error
if err = runCmd(gitBinary, params, dir); err == nil {
r.pulled = true
r.lastPull = time.Now()
logger().Printf("%v pulled.\n", r.Url)
r.lastCommit, err = r.getMostRecentCommit()
}
return err
}
// pullWithKey is used for private repositories and requires an ssh key.
// Note: currently only limited to Linux and OSX.
func (r *Repo) pullWithKey(params []string) error {
var gitSsh, script *os.File
// ensure temporary files deleted after usage
defer func() {
if gitSsh != nil {
os.Remove(gitSsh.Name())
}
if script != nil {
os.Remove(script.Name())
}
}()
var err error
// write git.sh script to temp file
gitSsh, err = writeScriptFile(gitWrapperScript(gitBinary))
if err != nil {
return err
}
// write git clone bash script to file
script, err = writeScriptFile(bashScript(gitSsh.Name(), r, params))
if err != nil {
return err
}
dir := ""
if r.pulled {
dir = r.Path
}
if err = runCmd(script.Name(), nil, dir); err == nil {
r.pulled = true
r.lastPull = time.Now()
logger().Printf("%v pulled.\n", r.Url)
r.lastCommit, err = r.getMostRecentCommit()
}
return err
}
// prepare prepares for a git pull
// and validates the configured directory
func (r *Repo) prepare() error {
// check if directory exists or is empty
// if not, create directory
fs, err := ioutil.ReadDir(r.Path)
if err != nil || len(fs) == 0 {
return os.MkdirAll(r.Path, os.FileMode(0755))
}
// validate git repo
isGit := false
for _, f := range fs {
if f.IsDir() && f.Name() == ".git" {
isGit = true
break
}
}
if isGit {
// check if same repository
var repoUrl string
if repoUrl, err = r.getRepoUrl(); err == nil && repoUrl == r.Url {
r.pulled = true
return nil
}
if err != nil {
return fmt.Errorf("Cannot retrieve repo url for %v Error: %v", r.Path, err)
}
return fmt.Errorf("Another git repo '%v' exists at %v", repoUrl, r.Path)
}
return fmt.Errorf("Cannot git clone into %v, directory not empty.", r.Path)
}
// getMostRecentCommit gets the hash of the most recent commit to the
// repository. Useful for checking if changes occur.
func (r *Repo) getMostRecentCommit() (string, error) {
command := gitBinary + ` --no-pager log -n 1 --pretty=format:"%H"`
c, args, err := middleware.SplitCommandAndArgs(command)
if err != nil {
return "", err
}
return runCmdOutput(c, args, r.Path)
}
// getRepoUrl retrieves remote origin url for the git repository at path
func (r *Repo) getRepoUrl() (string, error) {
_, err := os.Stat(r.Path)
if err != nil {
return "", err
}
args := []string{"config", "--get", "remote.origin.url"}
return runCmdOutput(gitBinary, args, r.Path)
}
// postPullCommand executes r.Then.
// It is trigged after successful git pull
func (r *Repo) postPullCommand() error {
if r.Then == "" {
return nil
}
c, args, err := middleware.SplitCommandAndArgs(r.Then)
if err != nil {
return err
}
if err = runCmd(c, args, r.Path); err == nil {
logger().Printf("Command %v successful.\n", r.Then)
}
return err
}
// initGit validates git installation and locates the git executable
// binary in PATH
func initGit() error {
// prevent concurrent call
initMutex.Lock()
defer initMutex.Unlock()
// if validation has been done before and binary located in
// PATH, return.
if gitBinary != "" {
return nil
}
// locate git binary in path
var err error
gitBinary, err = exec.LookPath("git")
return err
}
// runCmd is a helper function to run commands.
// It runs command with args from directory at dir.
// The executed process outputs to os.Stderr
func runCmd(command string, args []string, dir string) error {
cmd := exec.Command(command, args...)
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stderr
cmd.Dir = dir
if err := cmd.Start(); err != nil {
return err
}
return cmd.Wait()
}
// runCmdOutput is a helper function to run commands and return output.
// It runs command with args from directory at dir.
// If successful, returns output and nil error
func runCmdOutput(command string, args []string, dir string) (string, error) {
cmd := exec.Command(command, args...)
cmd.Dir = dir
var err error
if output, err := cmd.Output(); err == nil {
return string(bytes.TrimSpace(output)), nil
}
return "", err
}
// writeScriptFile writes content to a temporary file.
// It changes the temporary file mode to executable and
// closes it to prepare it for execution.
func writeScriptFile(content []byte) (file *os.File, err error) {
if file, err = ioutil.TempFile("", "caddy"); err != nil {
return nil, err
}
if _, err = file.Write(content); err != nil {
return nil, err
}
if err = file.Chmod(os.FileMode(0755)); err != nil {
return nil, err
}
return file, file.Close()
}
// gitWrapperScript forms content for git.sh script
var gitWrapperScript = func(gitBinary string) []byte {
return []byte(fmt.Sprintf(`#!/bin/bash
# The MIT License (MIT)
# Copyright (c) 2013 Alvin Abad
if [ $# -eq 0 ]; then
echo "Git wrapper script that can specify an ssh-key file
Usage:
git.sh -i ssh-key-file git-command
"
exit 1
fi
# remove temporary file on exit
trap 'rm -f /tmp/.git_ssh.$$' 0
if [ "$1" = "-i" ]; then
SSH_KEY=$2; shift; shift
echo "ssh -i $SSH_KEY \$@" > /tmp/.git_ssh.$$
chmod +x /tmp/.git_ssh.$$
export GIT_SSH=/tmp/.git_ssh.$$
fi
# in case the git command is repeated
[ "$1" = "git" ] && shift
# Run the git command
%v "$@"
`, gitBinary))
}
// bashScript forms content of bash script to clone or update a repo using ssh
var bashScript = func(gitShPath string, repo *Repo, params []string) []byte {
return []byte(fmt.Sprintf(`#!/bin/bash
mkdir -p ~/.ssh;
touch ~/.ssh/known_hosts;
ssh-keyscan -t rsa,dsa %v 2>&1 | sort -u - ~/.ssh/known_hosts > ~/.ssh/tmp_hosts;
cat ~/.ssh/tmp_hosts >> ~/.ssh/known_hosts;
%v -i %v %v;
`, repo.Host, gitShPath, repo.KeyPath, strings.Join(params, " ")))
}

View file

@ -24,11 +24,11 @@ type Markdown struct {
Next middleware.Handler
// The list of markdown configurations
Configs []MarkdownConfig
Configs []Config
}
// MarkdownConfig stores markdown middleware configurations.
type MarkdownConfig struct {
// Config stores markdown middleware configurations.
type Config struct {
// Markdown renderer
Renderer blackfriday.Renderer
@ -45,25 +45,6 @@ type MarkdownConfig struct {
Scripts []string
}
// New creates a new instance of Markdown middleware that
// renders markdown to HTML on-the-fly.
func New(c middleware.Controller) (middleware.Middleware, error) {
mdconfigs, err := parse(c)
if err != nil {
return nil, err
}
md := Markdown{
Root: c.Root(),
Configs: mdconfigs,
}
return func(next middleware.Handler) middleware.Handler {
md.Next = next
return md
}, nil
}
// ServeHTTP implements the http.Handler interface.
func (md Markdown) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
for _, m := range md.Configs {
@ -125,56 +106,6 @@ func (md Markdown) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error
return md.Next.ServeHTTP(w, r)
}
// parse creates new instances of Markdown middleware.
func parse(c middleware.Controller) ([]MarkdownConfig, error) {
var mdconfigs []MarkdownConfig
for c.Next() {
md := MarkdownConfig{
Renderer: blackfriday.HtmlRenderer(0, "", ""),
}
// Get the path scope
if !c.NextArg() || c.Val() == "{" {
return mdconfigs, c.ArgErr()
}
md.PathScope = c.Val()
// Load any other configuration parameters
for c.NextBlock() {
switch c.Val() {
case "ext":
exts := c.RemainingArgs()
if len(exts) == 0 {
return mdconfigs, c.ArgErr()
}
md.Extensions = append(md.Extensions, exts...)
case "css":
if !c.NextArg() {
return mdconfigs, c.ArgErr()
}
md.Styles = append(md.Styles, c.Val())
case "js":
if !c.NextArg() {
return mdconfigs, c.ArgErr()
}
md.Scripts = append(md.Scripts, c.Val())
default:
return mdconfigs, c.Err("Expected valid markdown configuration property")
}
}
// If no extensions were specified, assume .md
if len(md.Extensions) == 0 {
md.Extensions = []string{".md"}
}
mdconfigs = append(mdconfigs, md)
}
return mdconfigs, nil
}
const (
htmlTemplate = `<!DOCTYPE html>
<html>

View file

@ -10,24 +10,6 @@ import (
"github.com/mholt/caddy/middleware"
)
// New constructs a new Templates middleware instance.
func New(c middleware.Controller) (middleware.Middleware, error) {
rules, err := parse(c)
if err != nil {
return nil, err
}
tmpls := Templates{
Root: c.Root(),
Rules: rules,
}
return func(next middleware.Handler) middleware.Handler {
tmpls.Next = next
return tmpls
}, nil
}
// ServeHTTP implements the middleware.Handler interface.
func (t Templates) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error) {
for _, rule := range t.Rules {
@ -64,32 +46,6 @@ func (t Templates) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error
return t.Next.ServeHTTP(w, r)
}
func parse(c middleware.Controller) ([]Rule, error) {
var rules []Rule
for c.Next() {
var rule Rule
if c.NextArg() {
// First argument would be the path
rule.Path = c.Val()
// Any remaining arguments are extensions
rule.Extensions = c.RemainingArgs()
if len(rule.Extensions) == 0 {
rule.Extensions = defaultExtensions
}
} else {
rule.Path = defaultPath
rule.Extensions = defaultExtensions
}
rules = append(rules, rule)
}
return rules, nil
}
// Templates is middleware to render templated files as the HTTP response.
type Templates struct {
Next middleware.Handler
@ -104,7 +60,3 @@ type Rule struct {
Path string
Extensions []string
}
const defaultPath = "/"
var defaultExtensions = []string{".html", ".htm", ".txt"}

View file

@ -12,7 +12,7 @@ import (
// WebSocket represents a web socket server instance. A WebSocket
// is instantiated for each new websocket request/connection.
type WebSocket struct {
WSConfig
Config
*http.Request
}

View file

@ -19,12 +19,12 @@ type (
Next middleware.Handler
// Sockets holds all the web socket endpoint configurations
Sockets []WSConfig
Sockets []Config
}
// WSConfig holds the configuration for a single websocket
// endpoint which may serve multiple websocket connections.
WSConfig struct {
Config struct {
Path string
Command string
Arguments []string
@ -37,7 +37,7 @@ func (ws WebSockets) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, err
for _, sockconfig := range ws.Sockets {
if middleware.Path(r.URL.Path).Matches(sockconfig.Path) {
socket := WebSocket{
WSConfig: sockconfig,
Config: sockconfig,
Request: r,
}
websocket.Handler(socket.Handle).ServeHTTP(w, r)
@ -49,77 +49,6 @@ func (ws WebSockets) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, err
return ws.Next.ServeHTTP(w, r)
}
// New constructs and configures a new websockets middleware instance.
func New(c middleware.Controller) (middleware.Middleware, error) {
var websocks []WSConfig
var respawn bool
optionalBlock := func() (hadBlock bool, err error) {
for c.NextBlock() {
hadBlock = true
if c.Val() == "respawn" {
respawn = true
} else {
return true, c.Err("Expected websocket configuration parameter in block")
}
}
return
}
for c.Next() {
var val, path, command string
// Path or command; not sure which yet
if !c.NextArg() {
return nil, c.ArgErr()
}
val = c.Val()
// Extra configuration may be in a block
hadBlock, err := optionalBlock()
if err != nil {
return nil, err
}
if !hadBlock {
// The next argument on this line will be the command or an open curly brace
if c.NextArg() {
path = val
command = c.Val()
} else {
path = "/"
command = val
}
// Okay, check again for optional block
hadBlock, err = optionalBlock()
if err != nil {
return nil, err
}
}
// Split command into the actual command and its arguments
cmd, args, err := middleware.SplitCommandAndArgs(command)
if err != nil {
return nil, err
}
websocks = append(websocks, WSConfig{
Path: path,
Command: cmd,
Arguments: args,
Respawn: respawn, // TODO: This isn't used currently
})
}
GatewayInterface = envGatewayInterface
ServerSoftware = envServerSoftware
return func(next middleware.Handler) middleware.Handler {
return WebSockets{Next: next, Sockets: websocks}
}, nil
}
var (
// See CGI spec, 4.1.4
GatewayInterface string
@ -127,8 +56,3 @@ var (
// See CGI spec, 4.1.17
ServerSoftware string
)
const (
envGatewayInterface = "caddy-CGI/1.1"
envServerSoftware = "caddy/" // TODO: Version
)