diff --git a/.gitignore b/.gitignore
index 27009d8..4c2d777 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /venv
 __pycache__
+/data/doc
diff --git a/requirements.txt b/requirements.txt
index 97e4624..865daa4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,41 @@
-click==8.1.3
-colorama==0.4.5
-Flask==2.2.2
-importlib-metadata==4.12.0
-itsdangerous==2.1.2
-Jinja2==3.1.2
-MarkupSafe==2.1.1
-Werkzeug==2.2.2
-zipp==3.8.1
+alabaster==0.7.12
+Babel==2.10.3
+certifi==2022.6.15
+charset-normalizer==2.1.0
+click==8.1.3
+colorama==0.4.5
+docutils==0.17.1
+Flask==2.2.2
+idna==3.3
+imagesize==1.4.1
+importlib-metadata==4.12.0
+itsdangerous==2.1.2
+Jinja2==3.1.2
+linkify-it-py==2.0.0
+markdown-it-py==2.1.0
+MarkupSafe==2.1.1
+mdit-py-plugins==0.3.0
+mdurl==0.1.1
+myst-parser==0.18.0
+packaging==21.3
+pkg_resources==0.0.0
+Pygments==2.12.0
+pyparsing==3.0.9
+pytz==2022.2
+PyYAML==6.0
+requests==2.28.1
+snowballstemmer==2.2.0
+Sphinx==5.1.1
+sphinx-rtd-theme==1.0.0
+sphinxcontrib-applehelp==1.0.2
+sphinxcontrib-devhelp==1.0.2
+sphinxcontrib-htmlhelp==2.0.0
+sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-qthelp==1.0.3
+sphinxcontrib-serializinghtml==1.1.5
+sphinxcontrib-svg2pdfconverter==1.2.0
+typing_extensions==4.3.0
+uc-micro-py==1.0.1
+urllib3==1.26.11
+Werkzeug==2.2.2
+zipp==3.8.1
diff --git a/src/api/document.py b/src/api/document.py
index 0d1dc25..dc52911 100644
--- a/src/api/document.py
+++ b/src/api/document.py
@@ -1,8 +1,18 @@
 from flask import Blueprint, request
+from markupsafe import escape
+from web_utils.get_arg import get_arg
+
+from data.document import Document
 
 bp = Blueprint('document', __name__, url_prefix='/api/doc')
 
 @bp.route('/build')
 def build():
-    return '<p>Building '+request.args.get('doc')+'@'+request.args.get('branch')+' ...</p>'
+	doc_name = get_arg('doc')
+	branch = get_arg('branch', 'master')
+	
+	doc = Document(doc_name, branch)
+	output = doc.build()
+	
+	return output.replace('\n', '<br/>')
 
diff --git a/src/app.py b/src/app.py
index 85069a7..be16c7e 100644
--- a/src/app.py
+++ b/src/app.py
@@ -1,10 +1,15 @@
+import os
 from flask import Flask
+import data.document
 
 def create_app():
-    app = Flask(__name__)
+	app = Flask(__name__)
+	
+	src_path = os.path.dirname(os.path.realpath(__file__))
+	data.document.set_document_root(os.path.realpath(src_path+'/../data/doc'))
 
-    from api import document
-    app.register_blueprint(document.bp)
+	from api import document
+	app.register_blueprint(document.bp)
 
-    return app
+	return app
 
diff --git a/src/data/document.py b/src/data/document.py
new file mode 100644
index 0000000..d4ada63
--- /dev/null
+++ b/src/data/document.py
@@ -0,0 +1,43 @@
+import os
+from subprocess import Popen, PIPE, STDOUT
+
+document_root = None
+
+class Document:
+	def __init__(self, doc_name, branch = 'master'):
+		self.doc_name = doc_name
+		self.branch = branch
+		
+		#print(get_document_root())
+		#print(doc_name)
+		#print(branch)
+		
+		doc_path = os.path.realpath(get_document_root()+'/'+doc_name+'/'+branch)
+		if not doc_path.startswith(get_document_root()):
+			raise Exception("Invalid document path for '"+doc_name+"'@'"+branch)
+		
+		self.doc_path = doc_path
+	
+	def build(self):
+		#venv_path = os.getenv('VIRTUAL_ENV')
+		cmd = "sphinx-build -M html \""+self.doc_path + "/source\" \""+self.doc_path+"/build\""
+		p = Popen(cmd, stdout = PIPE, stderr = STDOUT, shell = True)
+		outputStr = ""
+		for line in p.stdout:
+			outputStr += line.decode()
+		
+		p.wait()
+		
+		if p.returncode != 0:
+			raise Exception("Build failed ("+str(p.returncode)+")\n"+outputStr)
+			
+		return outputStr
+
+def set_document_root(dir):
+	global document_root
+	document_root = dir
+	
+def get_document_root():
+	global document_root
+	return document_root
+
diff --git a/src/web_utils/get_arg.py b/src/web_utils/get_arg.py
new file mode 100644
index 0000000..063d1cd
--- /dev/null
+++ b/src/web_utils/get_arg.py
@@ -0,0 +1,11 @@
+from flask import request
+
+def get_arg(arg_name, default_value = None):
+	result = request.args.get(arg_name)
+	if result == None:
+		if default_value == None:
+			raise Exception("Missing query string parameter '"+arg_name+"'")
+		else:
+			return default_value
+	return result
+