From 2a668447ea4a6334a5d0ceb0168dc4a698e47123 Mon Sep 17 00:00:00 2001
From: GerardoP <gerardopaleo@gmail.com>
Date: Fri, 18 Sep 2020 13:18:10 -0700
Subject: [PATCH 1/4] Completed the Simple WSGI Excercise.

---
 wsgi_1.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/wsgi_1.py b/wsgi_1.py
index 85498d1..edcfe1c 100644
--- a/wsgi_1.py
+++ b/wsgi_1.py
@@ -21,11 +21,11 @@ def application(environ, start_response):
 
     response_body = body.format(
         software=environ.get('SERVER_SOFTWARE', default),
-        path="aaaa",
-        month="bbbb",
-        date="cccc",
-        year="dddd",
-        client_ip="eeee"
+        path=environ.get('PATH_INFO', default),
+        month=datetime.datetime.now().strftime('%B'),
+        date=datetime.datetime.now().day,
+        year=datetime.datetime.now().year,
+        client_ip=environ.get('REMOTE_ADDR')
     )
     status = '200 OK'
 

From d4b740e4675c8f5fa5dce620d17ce72969ca3c7a Mon Sep 17 00:00:00 2001
From: GerardoP <gerardopaleo@gmail.com>
Date: Tue, 29 Sep 2020 12:43:01 -0700
Subject: [PATCH 2/4] Implemented resolve_path function and revised application
 function

---
 .gitignore |  1 +
 bookapp.py | 39 ++++++++++++++++++++++++++++++++++++---
 2 files changed, 37 insertions(+), 3 deletions(-)
 create mode 100644 .gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ed8ebf5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+__pycache__
\ No newline at end of file
diff --git a/bookapp.py b/bookapp.py
index d2284c6..0ca4fd5 100644
--- a/bookapp.py
+++ b/bookapp.py
@@ -1,4 +1,5 @@
 import re
+import traceback
 
 from bookdb import BookDB
 
@@ -13,11 +14,43 @@ def books():
     return "<h1>a list of books</h1>"
 
 
+def resolve_path(path):
+    funcs = {
+        '': books,
+        'book': book
+    }
+
+    path = path.strip('/').split('/')
+
+    func_name = path[0]
+    args = path[1:]
+    try:
+        func = funcs[func_name]
+    except KeyError:
+        raise NameError
+    return func, args
+
+
 def application(environ, start_response):
-    status = "200 OK"
     headers = [('Content-type', 'text/html')]
-    start_response(status, headers)
-    return ["<h1>No Progress Yet</h1>".encode('utf8')]
+    try:
+        path = environ.get('PATH_INFO', None)
+        if path is None:
+            raise NameError
+        func, args = resolve_path(path)
+        body = func(*args)
+        status = '200 OK'
+    except NameError:
+        status = '404 Not Found'
+        body = '<h1>Not Found</h1>'
+    except Exception:
+        status = '500 Internal Server Error'
+        body = '<h1>Internal Server Error</h1>'
+        print(traceback.format_exc())
+    finally:
+        headers.append(('Content-length', str(len(body))))
+        start_response(status, headers)
+        return [body.encode('utf8')]
 
 
 if __name__ == '__main__':

From f14c2f415eff6de4024cbb9ef92829feecf9503d Mon Sep 17 00:00:00 2001
From: GerardoP <gerardopaleo@gmail.com>
Date: Tue, 29 Sep 2020 13:29:01 -0700
Subject: [PATCH 3/4] Implemented books function.

---
 bookapp.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/bookapp.py b/bookapp.py
index 0ca4fd5..0f4b780 100644
--- a/bookapp.py
+++ b/bookapp.py
@@ -11,7 +11,13 @@ def book(book_id):
 
 
 def books():
-    return "<h1>a list of books</h1>"
+    all_books = DB.titles()
+    body = ['<h1>My Bookshelf</h1>', '<ul>']
+    item_template = '<li><a href="http://github.com/book/%7Bid%7D">{title}</a></li>'
+    for book in all_books:
+        body.append(item_template.format(**book))
+    body.append('</ul>')
+    return '\n'.join(body)
 
 
 def resolve_path(path):

From cbb0365a813362546cc4448cc62e0327c1b7da5c Mon Sep 17 00:00:00 2001
From: GerardoP <gerardopaleo@gmail.com>
Date: Tue, 29 Sep 2020 14:16:19 -0700
Subject: [PATCH 4/4] Implemented book function.

---
 bookapp.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/bookapp.py b/bookapp.py
index 0f4b780..af45995 100644
--- a/bookapp.py
+++ b/bookapp.py
@@ -7,7 +7,19 @@
 
 
 def book(book_id):
-    return "<h1>a book with id %s</h1>" % book_id
+    page = '''
+    <h1>{title}</h1>
+    <table>
+    <tr><th>Author</th><td>{author}</td></tr>
+    <tr><th>Publisher</th><td>{publisher}</td></tr>
+    <tr><th>ISBN</th><td>{isbn}</td></tr>
+    </table>
+    <a href="http://github.com/">Back to the list </a>
+    '''
+    book = DB.title_info(book_id)
+    if book is None:
+        raise NameError
+    return page.format(**book)
 
 
 def books():