curl http_code返回不同​​的值

Question

我想製作一個升級filebot jar文件的「智能」腳本，但我遇到了一些問題，第一個問題是如果我使用curl比較在線和本地文件，有時候我收到的http_code是304，有時是200，這不是非常有用！ 首先，我產生一個時間戳文件，stat -c %Y ...但問題不在這裏，除了這一切的作品，有時返回200，有時304，我覺得這不是一個代碼問題，但也許有人知道一個更好的方式來做到這一點

curl -s -k http://sourceforge.net/projects/filebot/files/filebot/HEAD/FileBot.jar -z "$(date --rfc-2822 -d @$(</opt/usr/share/fbot/FileBot.jar.timestamp))" -o /opt/usr/share/filebot/FileBot.jar -L -w %{http_code} 

只是因爲我認爲這是一個「正常」的錯誤，我不能修復它，我鑫卡特趕HTTP_CODE，如果是200做一些塞入，如果是其他的東西，304和其他...

但我無法向http_code聲明一個變量而無需重新下載文件

我有這個代碼

 if [[ "$(curl -s -k $FILEBOTURL -z "$(date --rfc-2822 -d @$(<$FILEBOTTIMESTAMP))" -o $TMPFILE -L -w %{http_code})" == "200" ]]; then 
     echo "yep!" 
     get_timestamp 
    else 
     echo "I can't download the FileBot jar, try again later" 
     exit 
    fi 

正如你可以在理論上看，如果HTTP_CODE是200文件下載和升級，只有當HTTP_CODE是304文件已經更新。所以我的想法是捲曲一次，我需要和HTTP_CODE分配給一個varialbe，那麼如果變量是200等等...

我試圖做到這一點

if [[ "HTTPCODE=$(curl -s -k $FILEBOTURL -z "$(date --rfc-2822 -d @$(<$FILEBOTTIMESTAMP))" -o $TMPFILE -L -w %{http_code})" == "200" ]]; then 

但HTTPCODE是空的，所以任務失敗！

任何想法或建議？

Ĵ

---

好TNX rednoah，你怎麼看待這個？我試圖讓「直覺」，所以如果下載的文件是不正確或其他不做更新

#!/bin/sh 

set -e 

CAT=$(which cat) 
GREP=$(which grep) 
FIND=$(which find) 
RM=$(which rm) 
MV=$(which mv) 
ECHO=$(which echo) 
FILEBOTPROGRAM=$(which filebot) 
FILEBOTJAR=$($CAT $FILEBOTPROGRAM | $GREP -oP '(?<=-jar).*(?=)') 
FILEBOTDIR=$(dirname "${FILEBOTJAR}") 
TMPFILE="$FILEBOTDIR/fb.jar" 
FILEBOTTIMESTAMP="$FILEBOTJAR.timestamp" 
FILEBOTURL="http://sourceforge.net/projects/filebot/files/filebot/HEAD/FileBot.jar" 

#CLEAN 
if [[ -f $TMPFILE ]]; then 
    $RM $TMPFILE 
fi 

#FUNCTIONS 
get_timestamp() { 
    $ECHO -n "Info: Generating new timestamp for the jar ... " 
    stat -c %Y $FILEBOTJAR > $FILEBOTTIMESTAMP 
    $ECHO "done, happy file renaming with your upgraded FileBot" 
    exit 
} 

update_check() { 
    $ECHO -n "Info: Let's check if the Head of FileBot is updated ... " 
    if [[ -f $FILEBOTTIMESTAMP ]]; then 
     HTTPCODE=$(curl -s -k $FILEBOTURL -z "$(date --rfc-2822 -d @$(<$FILEBOTTIMESTAMP))" -o $TMPFILE -L -w %{http_code}) 
     if [[ $HTTPCODE == "200" ]]; then 
      if [[ $($FIND $TMPFILE -type f -size +25M 2>/dev/null) ]]; then 
       $MV $TMPFILE $FILEBOTJAR 
       $ECHO "yep, downloaded and upgraded!" 
       get_timestamp 
      fi 
      $ECHO "No new version of FileBot are available" 
      exit 
     fi 
     if [[ $HTTPCODE == "304" ]]; then 
      $ECHO "No new version of FileBot are available" 
      exit 
     fi 
     if [[ $HTTPCODE == "404" ]]; then 
      $ECHO "I can't download the FileBot jar, try again later" 
      exit 
     fi 
    else 
     $ECHO "I can't know if there's an update, so I'll perform a full update and I take note of this" 
     HTTPCODE=$(curl -s -k $FILEBOTURL -o $TMPFILE -L -w %{http_code}) 
     if [[ $HTTPCODE == "200" ]]; then 
      if [[ $($FIND $TMPFILE -type f -size +25M 2>/dev/null) ]]; then 
       $MV $TMPFILE $FILEBOTJAR 
       $ECHO "jar, downloaded and upgraded!" 
       get_timestamp 
      fi 
      $RM $TMPFILE 
      $ECHO "I can't download the FileBot jar, try again later" 
     fi 
    fi 
} 

recovery() { 
    if [[ -f $TMPFILE ]]; then 
     $RM $TMPFILE 
    fi 
    $ECHO "yep but don't works very well, I'll try to fix it! Please be patient" 
    $ECHO "" 
    $RM $FILEBOTJAR 
    HTTPCODE=$(curl -s -k $FILEBOTURL -o $TMPFILE -L -w %{http_code}) 
    if [[ $HTTPCODE == "200" ]]; then 
     if [[ $($FIND $TMPFILE -type f -size +25M 2>/dev/null) ]]; then 
      $MV $TMPFILE $FILEBOTJAR 
      $ECHO "jar, downloaded and upgraded!" 
      get_timestamp 
     fi 
     $RM $TMPFILE 
     $ECHO "I can't download the FileBot jar, try again later" 
    fi 
} 

#THE SCRIPT 
clear 

$ECHO "" 
$ECHO "=============================================================" 
$ECHO "    Filebot Auto-Updater script" 
$ECHO "=============================================================" 
$ECHO "" 

$ECHO -n "Info: Checking if FileBot jar exist ... " 
if [[ -f $FILEBOTJAR ]]; then 
    # so the file exist but I don't know if works correctly, so 
    $FILEBOTPROGRAM $FILEBOTJAR -version || recovery 
    $ECHO "yep and works like a charm, let's check if there are some update" 
    $ECHO "" 
    update_check 
else 
    $ECHO "I can't find FileBot, is installed?" 
    exit 
fi 

Answer 1

有針對在FileBot便攜包的腳本： https://github.com/svn2github/filebot/blob/master/installer/portable/update-filebot.sh