mirror of
https://salsa.debian.org/mdosch/feed-to-muc.git
synced 2024-09-19 23:10:52 +02:00
Prepared for in-memory-caching (not yet functional).
This commit is contained in:
Martin Dosch
parent
1bdf8c048f
commit
fb21d01556
2 changed files with 106 additions and 95 deletions
192
getArticles.go
192
getArticles.go
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@ -17,104 +17,110 @@ import (
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"jaytaylor.com/html2text"
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)
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// ToDo: If caching == false create a global variable to save timestamp in memory.
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// Get new articles for specified feed.
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func getArticles(feedURL string, max int, noExcerpt bool, filter []string) (string, error) {
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func getArticles(feedURL string, max int, noExcerpt bool, filter []string, caching bool) (string, error) {
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type feedCache struct {
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LastChange string
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}
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var output, cachePath string
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var output, cachePath, cacheFile string
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var last time.Time
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var lastUpdate feedCache
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var file *os.File
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var updateTime time.Time
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// Get systems user cache path.
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osCacheDir := os.Getenv("$XDG_CACHE_HOME")
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if osCacheDir != "" {
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// Create configPath if not yet existing.
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cachePath = osCacheDir + "/feed-to-muc/"
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if caching == true {
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// Get systems user cache path.
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osCacheDir := os.Getenv("$XDG_CACHE_HOME")
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if osCacheDir != "" {
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// Create configPath if not yet existing.
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cachePath = osCacheDir + "/feed-to-muc/"
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if _, err := os.Stat(cachePath); os.IsNotExist(err) {
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err = os.MkdirAll(cachePath, 0700)
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if err != nil {
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log.Fatal("Error: Can't create cache path:", err)
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}
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}
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} else { // Get the current user.
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curUser, err := user.Current()
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if err != nil {
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log.Fatal("Error: Can't get current user:", err)
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return "", err
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}
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// Get home directory.
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home := curUser.HomeDir
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if home == "" {
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log.Fatal("Error: No home directory available.")
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return "", err
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}
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// Create cachePath if not yet existing.
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cachePath = home + "/.cache/feed-to-muc/"
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if _, err := os.Stat(cachePath); os.IsNotExist(err) {
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err = os.MkdirAll(cachePath, 0700)
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if err != nil {
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log.Fatal("Error: Can't create cache path:", err)
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}
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}
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}
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// Create a hash as identifier for the feed.
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// The identifier will be used as filename for caching the update time.
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h := fnv.New32a()
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h.Write([]byte(feedURL))
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if _, err := os.Stat(cachePath); os.IsNotExist(err) {
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err = os.MkdirAll(cachePath, 0700)
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if err != nil {
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log.Fatal("Error: Can't create cache path:", err)
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log.Fatal("Error: Can't create hash identifier for cache file:", err)
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}
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}
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} else { // Get the current user.
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curUser, err := user.Current()
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if err != nil {
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log.Fatal("Error: Can't get current user:", err)
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return "", err
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}
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// Get home directory.
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home := curUser.HomeDir
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cacheFile = cachePath + strconv.Itoa(int(h.Sum32()))
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if home == "" {
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log.Fatal("Error: No home directory available.")
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return "", err
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}
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// Create cachePath if not yet existing.
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cachePath = home + "/.cache/feed-to-muc/"
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if _, err := os.Stat(cachePath); os.IsNotExist(err) {
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err = os.MkdirAll(cachePath, 0700)
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if _, err := os.Stat(cacheFile); os.IsNotExist(err) {
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file, err = os.Create(cacheFile)
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if err != nil {
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log.Fatal("Error: Can't create cache path:", err)
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log.Fatal("Error: Can't create cache file:", err)
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}
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defer file.Close()
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last = time.Now()
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lastUpdate.LastChange = last.Format(time.RFC3339)
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lastUpdateJSON, _ := json.MarshalIndent(lastUpdate, "", " ")
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_, err = file.Write(lastUpdateJSON)
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if err != nil {
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log.Fatal("Error: Can't write last update time stamp to cache file:", err)
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}
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} else {
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file, err = os.OpenFile(cacheFile, os.O_RDWR, 0600)
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if err != nil {
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log.Fatal("Error: Can't open cache file:", err)
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}
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defer file.Close()
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decoder := json.NewDecoder(file)
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lastUpdate := feedCache{}
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if err := decoder.Decode(&lastUpdate); err != nil {
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log.Fatal("Error: Can't decode laste updates time stamp:", err)
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}
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last, err = time.Parse(time.RFC3339, string(lastUpdate.LastChange))
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if err != nil {
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log.Fatal("Error: Can't parse last updates time stamp:", err)
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}
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}
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}
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// Create a hash as identifier for the feed.
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// The identifier will be used as filename for caching the update time.
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h := fnv.New32a()
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h.Write([]byte(feedURL))
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if _, err := os.Stat(cachePath); os.IsNotExist(err) {
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err = os.MkdirAll(cachePath, 0700)
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if err != nil {
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log.Fatal("Error: Can't create hash identifier for cache file:", err)
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}
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}
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cacheFile := cachePath + strconv.Itoa(int(h.Sum32()))
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if _, err := os.Stat(cacheFile); os.IsNotExist(err) {
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file, err = os.Create(cacheFile)
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if err != nil {
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log.Fatal("Error: Can't create cache file:", err)
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}
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defer file.Close()
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last = time.Now()
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lastUpdate.LastChange = last.Format(time.RFC3339)
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lastUpdateJSON, _ := json.MarshalIndent(lastUpdate, "", " ")
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_, err = file.Write(lastUpdateJSON)
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if err != nil {
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log.Fatal("Error: Can't write last update time stamp to cache file:", err)
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}
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} else {
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file, err = os.OpenFile(cacheFile, os.O_RDWR, 0600)
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if err != nil {
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log.Fatal("Error: Can't open cache file:", err)
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}
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defer file.Close()
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decoder := json.NewDecoder(file)
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lastUpdate := feedCache{}
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if err := decoder.Decode(&lastUpdate); err != nil {
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log.Fatal("Error: Can't decode laste updates time stamp:", err)
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}
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last, err = time.Parse(time.RFC3339, string(lastUpdate.LastChange))
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if err != nil {
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log.Fatal("Error: Can't parse last updates time stamp:", err)
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}
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last = time.Now()
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}
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fp := gofeed.NewParser()
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@ -174,24 +180,26 @@ func getArticles(feedURL string, max int, noExcerpt bool, filter []string) (stri
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last = updateTime
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lastUpdate.LastChange = updateTime.Format(time.RFC3339)
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// Remove file with cached timestamp and create it
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// again with updated timestamp.
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// ToDo: Replace timestamp without deleting.
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err = os.Remove(cacheFile)
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if err != nil {
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log.Fatal("Error: Can't delete cache file:", err)
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}
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if caching == true {
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// Remove file with cached timestamp and create it
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// again with updated timestamp.
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// ToDo: Replace timestamp without deleting.
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err = os.Remove(cacheFile)
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if err != nil {
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log.Fatal("Error: Can't delete cache file:", err)
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}
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file, err = os.Create(cacheFile)
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if err != nil {
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log.Fatal("Error: Can't create cache file:", err)
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}
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defer file.Close()
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file, err = os.Create(cacheFile)
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if err != nil {
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log.Fatal("Error: Can't create cache file:", err)
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}
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defer file.Close()
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lastUpdateJSON, _ := json.MarshalIndent(lastUpdate, "", " ")
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_, err = file.Write(lastUpdateJSON)
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if err != nil {
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log.Fatal("Error: Can't write last update time stamp to cache file:", err)
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lastUpdateJSON, _ := json.MarshalIndent(lastUpdate, "", " ")
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_, err = file.Write(lastUpdateJSON)
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if err != nil {
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log.Fatal("Error: Can't write last update time stamp to cache file:", err)
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}
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}
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// Remove redirects and tracking parameters from URL.
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9
main.go
9
main.go
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@ -17,11 +17,12 @@ type configuration struct {
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Password string
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Muc string
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MucNick string
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Contact string
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MaxArticles int
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RefreshTime time.Duration
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NoExcerpt bool
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Quiet bool
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Contact string
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Caching bool
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Filter []string
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Feeds []string
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}
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@ -72,7 +73,8 @@ func main() {
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go pingMUC(client, config.BotJid, config.Muc, config.MucNick)
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// Starting goroutine to process received stanzas.
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go processStanzas(client, config.Muc, config.MucNick, config.Feeds, config.Quiet, config.Contact)
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go processStanzas(client, config.Muc, config.MucNick, config.Feeds, config.Quiet,
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config.Contact)
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// Set RefreshTime to 30 seconds if not defined.
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if config.RefreshTime == 0 {
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@ -83,7 +85,8 @@ func main() {
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// Check all configured feeds for new articles and send
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// new articles to configured MUC.
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for i := 0; i < len(config.Feeds); i++ {
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output, err := getArticles(config.Feeds[i], config.MaxArticles, config.NoExcerpt, config.Filter)
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output, err := getArticles(config.Feeds[i], config.MaxArticles, config.NoExcerpt,
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config.Filter, config.Caching)
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if err != nil {
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// Exit if an error occurs checking the feeds.
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log.Fatal("Error: Can't check feeds for new articles: ", err)
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