java display pdf

open pdf file using jsp

jsp display pdf in browser

The process of connecting and authenticating to a remote server looks like this in Python: 1. 2. Create a POP3_SSL or just a plain POP3 object, and pass the remote hostname and port to it. Call user() and pass_() to send the username and password. Note the underscore in pass_()! It is present because pass is a keyword in Python and cannot be used for a method name. If the exception poplib.error_proto is raised, it means that the login has failed and the string value of the exception contains the error explanation sent by the server.

Inserting a name into the names table is easy. Using the INSERT INTO statement, you can list the column names, followed by the VALUES keyword and the actual values: INSERT INTO names (id, firstname, lastname) VALUES (1, 'John', 'Doe') It is possible to skip the column names, but that means you rely on the order of the columns in the table something that Murphy tells you is bound to change if you rely on it. Although I placed the command on a single line, feel free to break your larger queries into multiple lines for readability s sake because SQL is not sensitive to line breaks. When inserting items into the names table, you can have the database generate the id values automatically by telling it that the column will AUTOINCREMENT when creating the table.

From the Projects list, you can click Project Details, Delete, or Edit to modify your project in the Block Creator. Sharing your block is easy, too: click the Share link to publish it to the Popfly community.

The choice between POP3 and POP3_SSL is governed by whether your e-mail provider offers or, in this day and age, even requires that you connect over an encrypted connection. Consult 6 for more information about SSL, but the general guideline should be to use it whenever it is at all feasible for you to do so. Listing 14 1 uses the foregoing steps to log in to a remote POP server. Once connected, it calls stat(), which returns a simple tuple giving the number of messages in the mailbox and the messages total size. Finally, the program calls quit(), which closes the POP connection. Listing 14 1. A Very Simple POP Session #!/usr/bin/env python # POP connection and authentication - 14 - popconn.py import getpass, poplib, sys if len(sys.argv) != 3: print 'usage: %s hostname user' % sys.argv[0] exit(2) hostname, user = sys.argv[1:] passwd = getpass.getpass() p = poplib.POP3_SSL(hostname) # or "POP3" if SSL is not supported try: p.user(user) p.pass_(passwd) except poplib.error_proto, e: print "Login failed:", e else: status = p.stat() print "You have %d messages totaling %d bytes" % status finally: p.quit() You can test this program if you have a POP account somewhere. Most people do even large webmail services like GMail provide POP as an alternate means of checking your mailbox. Run the preceding program, giving it two command-line arguments: the hostname of your POP server, and your username. If you do not know this information, contact your Internet provider or network administrator; note that on some services your username will be a plain string (like guido), whereas on others it will be your full e-mail address (guido@example.com). The program will then prompt you for your password. Finally, it will display the mailbox status, without touching or altering any of your mail.

databases might not support it at all. This means that the table creation statements might be incompatible.

Caution! While this program does not alter any messages, some POP servers will nonetheless alter mailbox flags simply because you connected. Running the examples in this chapter against a live mailbox could cause you to lose information about which messages are read, unread, new, or old. Unfortunately, that behavior is serverdependent, and beyond the control of POP clients. I strongly recommend running these examples against a test mailbox rather than your live mailbox!

When you have put your data into a database, you need to be able to retrieve it to view it. This is where the SELECT command enters the picture. The command can be used to dump the entire contents of a table, but it can also be instructed to look for specific data, sort it, group it, and perform calculations. Let s start by asking for the entire contents of the names table: SELECT * FROM names This line returns the entire names table, as follows. I have executed additional INSERT statements. The asterisk between the SELECT and FROM works means that you are interested in all columns.

best free online pdf to word converter for mac, tiff to pdf converter free download online, convert multiple excel files to pdf online, convert pdf to jpg android online