From eb36e4c9737dee9dd3aaef56abcfcf6c407bd100 Mon Sep 17 00:00:00 2001
From: Ted Trask <ttrask01@yahoo.com>
Date: Wed, 3 Sep 2008 13:51:14 +0000
Subject: Added javascript tail functionality to logfiles.

git-svn-id: svn://svn.alpinelinux.org/acf/alpine-baselayout/trunk@1441 ab2d0c66-481e-0410-8bed-d214d4d58bed
---
 logfiles-controller.lua  |  7 +++++++
 logfiles-model.lua       | 32 ++++++++++++++++++++++++++++++++
 logfiles-status-html.lsp |  2 ++
 logfiles-tail-ajax.lsp   | 12 ++++++++++++
 logfiles-tail-html.lsp   | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 99 insertions(+)
 create mode 100644 logfiles-tail-ajax.lsp
 create mode 100644 logfiles-tail-html.lsp

diff --git a/logfiles-controller.lua b/logfiles-controller.lua
index dc22115..2af76ee 100644
--- a/logfiles-controller.lua
+++ b/logfiles-controller.lua
@@ -24,3 +24,10 @@ download = function (self)
 	
 	return filecontent
 end
+
+tail = function (self)
+	if self.clientdata.offset then
+		self.conf.viewtype = "ajax"
+	end
+	return self.model.tail(self.clientdata.name, self.clientdata.offset)
+end
diff --git a/logfiles-model.lua b/logfiles-model.lua
index 2ac4f5d..54aceee 100644
--- a/logfiles-model.lua
+++ b/logfiles-model.lua
@@ -76,6 +76,38 @@ get_filedetails = function (path)
 	return filedetails
 end
 
+tail = function(path, offset)
+	local filename = cfe({ value=path, label="File name", errtxt="File not found" })
+	local filesize = cfe({ value="0", label="File size" })
+	local filecontent = cfe({ type="longtext", label="File content" })
+	local fileoffset = cfe({ value="0", label="File offset" })
+
+	local available_files = get()
+	for i,file in ipairs(available_files.value) do
+		if ( file.value.filename.value == path ) then
+			filename.errtxt = nil
+			local f = io.open(path)
+			if tonumber(offset) then
+				fileoffset.value = offset
+				offset = tonumber(offset)
+				if offset < 0 then
+					f:seek("end", offset)
+				else
+					f:seek("set", offset)
+				end
+				filecontent.value = f:read("*all")
+				filesize.value = f:seek()
+			else
+				filesize.value = f:seek("end")
+				fileoffset.value = filesize.value
+			end
+			f:close()
+			break
+		end
+	end
+	
+	return cfe({ type="group", value={filename=filename, filecontent=filecontent, filesize=filesize, fileoffset=fileoffset}, label="Tail Config file details" })
+end
 
 get = function ()
 	-- These folders (and their subfolers) are going to be listed
diff --git a/logfiles-status-html.lsp b/logfiles-status-html.lsp
index f25d8a4..d11e16d 100644
--- a/logfiles-status-html.lsp
+++ b/logfiles-status-html.lsp
@@ -9,6 +9,7 @@
 	<TR style="background:#eee;font-weight:bold;">
 		<TD style="padding-right:20px;white-space:nowrap;" class="header">Delete</TD>
 		<TD style="padding-right:20px;white-space:nowrap;" class="header">View</TD>
+		<TD style="padding-right:20px;white-space:nowrap;" class="header">Tail</TD>
 		<TD style="padding-right:20px;white-space:nowrap;" class="header">Save</TD>
 		<TD style="padding-right:20px;white-space:nowrap;text-align:right;" class="header">Size</TD>
 		<TD style="padding-right:20px;white-space:nowrap;" class="header">Last Modified</TD>
@@ -24,6 +25,7 @@
 			<%= html.link{value = "delete?name="..file.value.filename.value, label="Delete" } %>
 		<% end %></TD>
 		<TD style="padding-right:20px;white-space:nowrap;"><%= html.link{value = "view?name="..file.value.filename.value, label="View" } %></TD>
+		<TD style="padding-right:20px;white-space:nowrap;"><%= html.link{value = "tail?name="..file.value.filename.value, label="Tail" } %></TD>
 		<TD style="padding-right:20px;white-space:nowrap;"><%= html.link{value = "download?name="..file.value.filename.value, label="Download" } %></TD>
 		<TD style="padding-right:20px;white-space:nowrap;text-align:right"><%= file.value.filesize.value %></TD>
 		<TD style="padding-right:20px;white-space:nowrap;"><%= file.value.mtime.value %></TD>
diff --git a/logfiles-tail-ajax.lsp b/logfiles-tail-ajax.lsp
new file mode 100644
index 0000000..8697208
--- /dev/null
+++ b/logfiles-tail-ajax.lsp
@@ -0,0 +1,12 @@
+<% local view, viewlibrary, page_info = ... %>
+<%
+	require("json")
+	require("html")
+%>
+Status: 200 OK
+Content-Type: "application/json"
+<% io.write("\n") %>
+<%
+	view.value.filecontent.value = html.html_escape(view.value.filecontent.value)
+	print(json.encode(view))
+%>
diff --git a/logfiles-tail-html.lsp b/logfiles-tail-html.lsp
new file mode 100644
index 0000000..5b5d767
--- /dev/null
+++ b/logfiles-tail-html.lsp
@@ -0,0 +1,46 @@
+<% local form, viewlibrary, page_info = ... %>
+<% require("viewfunctions") %>
+
+<script type="text/javascript" src="/js/jquery-latest.js"></script>
+<script type="text/javascript">
+	var currentoffset = -1024
+	var ID
+	function Update(){
+		$.getJSON(
+			'<%= page_info.script .. page_info.prefix .. page_info.controller .. "/" .. page_info.action %>',
+			{name:'<%= form.value.filename.value %>', offset:currentoffset},
+			function(data) {
+				data.value.filecontent.value = data.value.filecontent.value.split("\n").join("<br>\n");
+				$("#filecontent").append(data.value.filecontent.value).scrollTop(999999999);
+				currentoffset = data.value.filesize.value;
+				$("DT:contains('File size')").next().text(currentoffset);
+			}
+		);
+		ID=window.setTimeout("Update();", 1000);
+	}
+	$(function(){
+		$("#Start").attr("disabled","disabled");
+	   	<% if not form.value.filename.errtxt then %>
+	   	Update();
+		<% else %>
+		$("#Stop").attr("disabled","disabled");
+		<% end %>
+	});
+</script>
+
+<H1>Tail File</H1>
+<DL>
+<% 
+displayitem(form.value.filename)
+displayitem(form.value.filesize)
+%>
+</DL>
+<textarea id="filecontent">
+</textarea>
+<DL>
+<DT>Start / Stop tailing file</DT>
+<DD>
+<input TYPE="button" ID="Start" VALUE="Start" onClick='Update(); $("#Start").attr("disabled","disabled");$("#Stop").removeAttr("disabled");'>
+<input TYPE="button" ID="Stop" VALUE="Stop" onClick='window.clearTimeout(ID); $("#Stop").attr("disabled","disabled");$("#Start").removeAttr("disabled");'>
+</DD>
+</DL>
-- 
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