Add pdfrotate module

author: tomsmeding <tom.smeding@gmail.com> 2017-11-16 00:33:41 +0100
committer: tomsmeding <tom.smeding@gmail.com> 2017-11-16 00:33:47 +0100
commit: dbd9786a07e9c10cfe07db58f660fa186243b9a3 (patch)
tree: b5e231bd999cbdde1432027561bfa59efe506f63
parent: 4ef74766662a8b57124cdc4b7a9fdafd686f0de2 (diff)
5 files changed, 386 insertions, 0 deletions
diff --git a/modules/pdfrotate/editor.html b/modules/pdfrotate/editor.html
new file mode 100644
index 0000000..6be03a8
--- /dev/null
+++ b/modules/pdfrotate/editor.html
@@ -0,0 +1,17 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>PDF rotate</title>
+<script>
+var sessionid=(function(){
+	var spl=location.href.split("/");
+	return spl[spl.length-1];
+})();
+</script>
+</head>
+<body>
+Editor...
+</body>
+<script>alert(sessionid);</script>
+</html>
diff --git a/modules/pdfrotate/index.html b/modules/pdfrotate/index.html
new file mode 100644
index 0000000..ae63865
--- /dev/null
+++ b/modules/pdfrotate/index.html
@@ -0,0 +1,65 @@
+<!doctype html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>PDF rotate</title>
+<script>
+window.addEventListener("load",function(){
+	var errc=location.href.split("?err=")[1];
+	if(errc){
+		if(errc=="nopdf")alert("That doesn't seem to be a PDF document.");
+		else if(errc=="rot0")alert("Haha your document was already upright. Maybe just use that instead?");
+		else if(errc=="invrot")alert("Don't bug my form, that rotation was invalid!");
+		else if(errc=="pdfjamerr")alert("An error occurred trying to convert that document. Maybe it isn't a PDF document?");
+		else alert("Unknown error occurred ('"+errc+"')");
+	}
+});
+</script>
+<style>
+.pagediagram {
+	display: inline-block;
+	border: 1px black solid;
+	width: 40px;
+	height: 56px;
+	font-family: sans-serif;
+	font-size: 40px;
+	text-align: center;
+	margin-left: 9px;
+	margin-right: 9px;
+	line-height: 62px;
+}
+</style>
+</head>
+<body>
+<h1>PDF rotate</h1>
+<p>Select a PDF file below.</p>
+<form method="POST" action="/pdfrotate/upload" enctype="multipart/form-data">
+	<input type="file" id="file" name="file" required><br>
+	<p>Click the button that looks most like the document you have. We will turn it upright.</p>
+	<table><tbody><tr>
+		<!-- CSS and pdfjam rotation are conveniently each other's inverses. -->
+		<td style="text-align: center;">
+			<label for="rot0"><div class="pagediagram" style="transform:rotate(0deg);">A</div></label><br>
+			<input type="radio" id="rot0" name="rotgroup" value="rot0" required>
+		</td>
+		<td style="text-align: center;">
+			<label for="rot90"><div class="pagediagram" style="transform:rotate(90deg);">A</div></label><br>
+			<input type="radio" id="rot90" name="rotgroup" value="rot90" required>
+		</td>
+		<td style="text-align: center;">
+			<label for="rot180"><div class="pagediagram" style="transform:rotate(180deg);">A</div></label><br>
+			<input type="radio" id="rot180" name="rotgroup" value="rot180" required>
+		</td>
+		<td style="text-align: center;">
+			<label for="rot270"><div class="pagediagram" style="transform:rotate(270deg);">A</div></label><br>
+			<input type="radio" id="rot270" name="rotgroup" value="rot270" required>
+		</td>
+	</tr></tbody></table>
+	<p>Now click the button below to finish the process!</p>
+	<input type="submit" value="Upload, turn and download result!">
+</form>
+<br>
+<br>
+<i><small>This uses <a href="https://warwick.ac.uk/fac/sci/statistics/staff/academic-research/firth/software/pdfjam/">pdfjam</a> to perform the actual hard work. Credits to me only for the slick rotated A's above.</small></i>
+</body>
+</html>
diff --git a/modules/pdfrotate/pdfrotate.js b/modules/pdfrotate/pdfrotate.js
new file mode 100644
index 0000000..a41241d
--- /dev/null
+++ b/modules/pdfrotate/pdfrotate.js
@@ -0,0 +1,106 @@
+var cmn=require("../$common.js"),
+    fs=require("fs"),
+    child_process=require("child_process"),
+    multer=require("multer"),
+    mkdirp=require("mkdirp");
+
+var moddir;
+
+var uniqid=(function(){
+	var id=0;
+	return function uniqid(){return id++;};
+})();
+
+function clearDirectory(path){
+	var entries=fs.readdirSync(path);
+	for(var i=0;i<entries.length;i++){
+		fs.unlinkSync(path+"/"+entries[i]);
+	}
+}
+
+function cleanUpDir(path){
+	var nowtime=new Date().getTime();
+	var entries=fs.readdirSync(path);
+	for(var i=0;i<entries.length;i++){
+		var stat=fs.statSync(path+"/"+entries[i]);
+		if(stat.mtime-nowtime>30*60*1000){
+			fs.unlink(path+"/"+entries[i],function(err){});
+		}
+	}
+}
+
+// Clear files older than 30 mins every 30 mins
+setInterval(function(){
+	process.nextTick(cleanUpDir(moddir+"/uploads"));
+	process.nextTick(cleanUpDir(moddir+"/converted"));
+},30*60*1000);
+
+module.exports=function(app,io,_moddir){
+	moddir=_moddir;
+
+	mkdirp.sync(moddir+"/uploads");
+	mkdirp.sync(moddir+"/converted");
+	clearDirectory(moddir+"/uploads");
+
+	var multerupload=multer({
+		storage: multer.diskStorage({
+			destination: function(req,file,cb){
+				cb(null,moddir+"/uploads/");
+			},
+			filename: function(req,file,cb){
+				cb(null,uniqid()+".pdf");
+			}
+		}),
+		limits: {
+			files: 1,
+			fileSize: 100*1024*1024
+		}
+	});
+
+	app.get("/pdfrotate",function(req,res){
+		res.sendFile(moddir+"/index.html");
+	});
+	app.post("/pdfrotate/upload",multerupload.single("file"),function(req,res){
+		if(!req.file){
+			res.sendFile(moddir+"/index.html");
+			return;
+		}
+		var origname=req.file.originalname;
+		var path=req.file.path;
+		var rot=req.body.rotgroup+"";
+		if(rot=="rot0"){
+			fs.unlink(path,function(err){});
+			res.redirect("/pdfrotate?err=rot0");
+			return;
+		}
+
+		var cmd;
+		switch(rot){
+			case "rot90": cmd="pdf90"; break;
+			case "rot180": cmd="pdf180"; break;
+			case "rot270": cmd="pdf270"; break;
+			default:
+				fs.unlink(path,function(err){});
+				res.redirect("/pdfrotate?err=invrot");
+				return;
+		}
+
+		var outfile=moddir+"/converted/"+uniqid()+".pdf";
+
+		child_process.execFile(cmd,[path,"-o",outfile],function(err,stdout,stderr){
+			if(err){
+				console.log(err);
+				res.redirect("/pdfrotate?err=pdfjamerr");
+				return;
+			}
+			var newname=origname.replace(/\.pdf$/,"_rotated.pdf");
+			res.download(outfile,newname,function(err){
+				fs.unlink(path,function(err){});
+				fs.unlink(outfile,function(err){});
+			});
+		});
+	});
+	app.get("/pdfrotate/upload",function(req,res){
+		res.redirect("/pdfrotate");
+	});
+};
diff --git a/package-lock.json b/package-lock.json
index 3b7a4ec..6efa6ab 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,6 +4,11 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "append-field": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/append-field/-/append-field-0.1.0.tgz",
+      "integrity": "sha1-bdxY+gg8e8VF08WZWygwzCNm1Eo="
+    },
     "basic-auth": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/basic-auth/-/basic-auth-1.1.0.tgz",
@@ -168,6 +173,73 @@
         }
       }
     },
+    "busboy": {
+      "version": "0.2.14",
+      "resolved": "https://registry.npmjs.org/busboy/-/busboy-0.2.14.tgz",
+      "integrity": "sha1-bCpiLvz0fFe7vh4qnDetNseSVFM=",
+      "requires": {
+        "dicer": "0.2.5",
+        "readable-stream": "1.1.14"
+      }
+    },
+    "concat-stream": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.0.tgz",
+      "integrity": "sha1-CqxmL9Ur54lk1VMvaUeE5wEQrPc=",
+      "requires": {
+        "inherits": "2.0.3",
+        "readable-stream": "2.3.3",
+        "typedarray": "0.0.6"
+      },
+      "dependencies": {
+        "isarray": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+          "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
+        },
+        "readable-stream": {
+          "version": "2.3.3",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.3.tgz",
+          "integrity": "sha512-m+qzzcn7KUxEmd1gMbchF+Y2eIUbieUaxkWtptyHywrX0rE8QEYqPC07Vuy4Wm32/xE16NcdBctb8S0Xe/5IeQ==",
+          "requires": {
+            "core-util-is": "1.0.2",
+            "inherits": "2.0.3",
+            "isarray": "1.0.0",
+            "process-nextick-args": "1.0.7",
+            "safe-buffer": "5.1.1",
+            "string_decoder": "1.0.3",
+            "util-deprecate": "1.0.2"
+          }
+        },
+        "string_decoder": {
+          "version": "1.0.3",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
+          "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
+          "requires": {
+            "safe-buffer": "5.1.1"
+          }
+        }
+      }
+    },
+    "core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+    },
+    "dicer": {
+      "version": "0.2.5",
+      "resolved": "https://registry.npmjs.org/dicer/-/dicer-0.2.5.tgz",
+      "integrity": "sha1-WZbAhrszIYyBLAkL3cCc0S+stw8=",
+      "requires": {
+        "readable-stream": "1.1.14",
+        "streamsearch": "0.1.2"
+      }
+    },
+    "ee-first": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
+      "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
+    },
     "express": {
       "version": "4.15.4",
       "resolved": "https://registry.npmjs.org/express/-/express-4.15.4.tgz",
@@ -472,6 +544,11 @@
       "resolved": "https://registry.npmjs.org/express-subdomain/-/express-subdomain-1.0.5.tgz",
       "integrity": "sha1-mQ75eUC39MKCPZWTZIt5voWKY4s="
     },
+    "inherits": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
+      "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
+    },
     "is-absolute": {
       "version": "0.2.6",
       "resolved": "https://registry.npmjs.org/is-absolute/-/is-absolute-0.2.6.tgz",
@@ -502,6 +579,57 @@
       "resolved": "https://registry.npmjs.org/is-windows/-/is-windows-0.2.0.tgz",
       "integrity": "sha1-3hqm1j6indJIc3tp8f+LgALSEIw="
     },
+    "isarray": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
+      "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8="
+    },
+    "media-typer": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
+      "integrity": "sha1-hxDXrwqmJvj/+hzgAWhUUmMlV0g="
+    },
+    "mime-db": {
+      "version": "1.30.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.30.0.tgz",
+      "integrity": "sha1-dMZD2i3Z1qRTmZY0ZbJtXKfXHwE="
+    },
+    "mime-types": {
+      "version": "2.1.17",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.17.tgz",
+      "integrity": "sha1-Cdejk/A+mVp5+K+Fe3Cp4KsWVXo=",
+      "requires": {
+        "mime-db": "1.30.0"
+      }
+    },
+    "minimist": {
+      "version": "0.0.8",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
+      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
+    },
+    "mkdirp": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "requires": {
+        "minimist": "0.0.8"
+      }
+    },
+    "multer": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/multer/-/multer-1.3.0.tgz",
+      "integrity": "sha1-CSsmcPaEb6SRSWXvyM+Uwg/sbNI=",
+      "requires": {
+        "append-field": "0.1.0",
+        "busboy": "0.2.14",
+        "concat-stream": "1.6.0",
+        "mkdirp": "0.5.1",
+        "object-assign": "3.0.0",
+        "on-finished": "2.3.0",
+        "type-is": "1.6.15",
+        "xtend": "4.0.1"
+      }
+    },
     "naampje": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/naampje/-/naampje-1.0.1.tgz",
@@ -537,6 +665,40 @@
         }
       }
     },
+    "object-assign": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-3.0.0.tgz",
+      "integrity": "sha1-m+3VygiXlJvKR+f/QIBi1Un1h/I="
+    },
+    "on-finished": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.3.0.tgz",
+      "integrity": "sha1-IPEzZIGwg811M3mSoWlxqi2QaUc=",
+      "requires": {
+        "ee-first": "1.1.1"
+      }
+    },
+    "process-nextick-args": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-1.0.7.tgz",
+      "integrity": "sha1-FQ4gt1ZZCtP5EJPyWk8q2L/zC6M="
+    },
+    "readable-stream": {
+      "version": "1.1.14",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.1.14.tgz",
+      "integrity": "sha1-fPTFTvZI44EwhMY23SB54WbAgdk=",
+      "requires": {
+        "core-util-is": "1.0.2",
+        "inherits": "2.0.3",
+        "isarray": "0.0.1",
+        "string_decoder": "0.10.31"
+      }
+    },
+    "safe-buffer": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.1.tgz",
+      "integrity": "sha512-kKvNJn6Mm93gAczWVJg7wH+wGYWNrDHdWvpUmHyEsgCtIwwo3bqPtV4tR5tuPaUhTOo/kvhVwd8XwwOllGYkbg=="
+    },
     "socket.io": {
       "version": "1.7.4",
       "resolved": "https://registry.npmjs.org/socket.io/-/socket.io-1.7.4.tgz",
@@ -878,10 +1040,44 @@
         }
       }
     },
+    "streamsearch": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-0.1.2.tgz",
+      "integrity": "sha1-gIudDlb8Jz2Am6VzOOkpkZoanxo="
+    },
+    "string_decoder": {
+      "version": "0.10.31",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+      "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ="
+    },
+    "type-is": {
+      "version": "1.6.15",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.15.tgz",
+      "integrity": "sha1-yrEPtJCeRByChC6v4a1kbIGARBA=",
+      "requires": {
+        "media-typer": "0.3.0",
+        "mime-types": "2.1.17"
+      }
+    },
+    "typedarray": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
+      "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
+    },
     "unc-path-regex": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/unc-path-regex/-/unc-path-regex-0.1.2.tgz",
       "integrity": "sha1-5z3T17DXxe2G+6xrCufYxqadUPo="
+    },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+    },
+    "xtend": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
+      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
     }
   }
 }
diff --git a/package.json b/package.json
index 2b8d5f5..2518305 100644
--- a/package.json
+++ b/package.json
@@ -9,6 +9,8 @@
     "body-parser": "^1.15.2",
     "express": "^4.14.0",
     "express-subdomain": "^1.0.5",
+    "mkdirp": "^0.5.1",
+    "multer": "^1.3.0",
     "naampje": "^1.0.1",
     "node-persist": "^2.0.2",
     "socket.io": "^1.4.8"
author	tomsmeding <tom.smeding@gmail.com>	2017-11-16 00:33:41 +0100
committer	tomsmeding <tom.smeding@gmail.com>	2017-11-16 00:33:47 +0100
commit	dbd9786a07e9c10cfe07db58f660fa186243b9a3 (patch)
tree	b5e231bd999cbdde1432027561bfa59efe506f63
parent	4ef74766662a8b57124cdc4b7a9fdafd686f0de2 (diff)