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How can i convert scraping script as web-service?

I want to build a api that accepts a string and returns html code.
Here is my scraping code that i want as a web-service.
Code
from selenium import webdriver
import bs4
import requests
import time
url = "https://www.pnrconverter.com/"
browser = webdriver.Firefox()
browser.get(url)
string = "3 PS 232 M 03FEB 7 JFKKBP HK2 1230A 420P 03FEB E
PS/JPIX8U"
button =
browser.find_element_by_xpath("//textarea[#class='dataInputChild']")
button.send_keys(string) #accept string
button.submit()
time.sleep(5)
soup = bs4.BeautifulSoup(browser.page_source,'html.parser')
html = soup.find('div',class_="main-content") #returns html
print(html)
Can anyone tell me the best possible solution to wrap up my code as a api/web-service.

There's no best possible solution in general, because a solution has to fit the problem and the available resources.
Right now it seems like you're trying to wrap someone else's website. If that's the problem you're actually trying to solve, and you want to give credit, you should probably just forward people to their site. Have your site return a 302 Redirect with their URL in the Location field in your header.
If what you're trying to do is get the response from this one sample check you have hardcoded, and and make that result available, I would suggest you put it in a static file behind nginx.
If what you're trying to do is use their backend to turn itineraries you have into responses you can return, you can do that by using their backend API, once that becomes available. Read the documentation, use the requests library to hit the API endpoint that you want, and get the JSON result back, and format it to your desires.
If you're trying to duplicate their site by making yourself a man-in-the-middle, that may be illegal and you should reconsider what you're doing.
For hosting purposes, you need to figure out how often your API will be hit. You can probably start on Heroku or something similar fairly easily, and scale up if you need to. You'll probably want WebObj or Flask or something similar sitting at the website where you intend to host this application. You can use those to process what I presume will be a simple request into the string you wish to hit their API with.

I am the owner of PNR Converter, so I can shed some light on your attempt to scrape content from our site. Unfortunately scraping from PNR Converter is not recommended. We are developing an API which looks like it would suit your needs, and should be ready in the not too distant future. If you contact us through the site we would be happy to work with you should you wish to use PNR Converter legitimately. PNR Converter gets at least one complete update per year and as such we change all the code on a regular basis. We also monitor all requests to our site, and we will block any requests which are deemed as improper usage. Our filter has already picked up your IP address (ends in 250.144) as potential misuse.
Like I said, should you wish to work with us at PNR Converter legitimately and not scrape our content then we would be happy to do so! please keep checking https://www.pnrconverter.com/api-introduction for information relating to our API.
We are releasing a backend upgrade this weekend, which will have a different HTML structure, and dynamically named elements which will cause a serious issue for web scrapers!

Programatically parsing web pages (with login/ssl)

I want to programmatically parse some Web pages on sites that do not have a publicly available API.
For example check if my grades are ready at the university.
Has anyone done anything like this and gotten to a usable solution? I'm probably looking for a library written in python or something similar, right?
Also note that some of these sites need login and/or ssl. How would you suggest to handle that?

I would recommend using urllib or urllib2, it allows you to send/receive requests and gives you HTML objects you can easily parse.
import urllib
proxies = {'http': 'http://proxy.example.com:8080/'}
opener = urllib.FancyURLopener(proxies)
f = opener.open("http://www.python.org")
f.read()
More information on how to use it : https://docs.python.org/2/library/urllib.html

Download from Megaupload with login - Python

It's my first question here.
Today, I've done a little application using wxPython: a simple Megaupload Downloader, but yet, it doesn't support premium accounts.
Now I would like to know how to download from MU with a login (free or premium user).
I'm very new to Python, so please don't be specific and "professional".
I used to download files with urlretrieve but, but is there a way to pass "arguments" or something to be able to log in as a premium user ?
Thank you. :D
EDIT =
News: new help needed xD
After trying with PyCUrl, htmllib2 and mechanize, I've done the login with urllib2 and cookiejar (the requested html says the username).
But when I start download a file, surely the server doesn't keep my login, in fact the downloaded file seems corrupted (I changed wait time from 45 to 25 seconds).
How can I download a file from MegaUpload keeping my previously done login? Thanks for your patient :D

Questions like this are usually frowned upon, they are very broad, and there are already an abundance of answers if you just search on google.
You can use urllib, or mechanize, or any library you can make an http post request with.
megaupload looks to have the form values
login:1
redir:1
username:
password:
just post those values at http://megaupload.com/?c=login
all you should have to do is set your username and password to the correct values!

For logging in using Python follow the following steps.
Find the list of parameters to be sent in the POST request and the url where the request has to be made by viewing the source of the login form. You may use a browser with "Inspect Element" feature to find it easily. [parameter name examples - userid, password]. Just check the tags name attribute.
Most of the sites set a cookie on logging in and the cookie has to be sent along with subsequent requests. To handle this download httllib2 (http://code.google.com/p/httplib2/ ) and read the wiki page on the link given. It has shown how to login with examples.
Now you can make subsequent requests for files, the cookies etc. will be handled automatically by httplib2.

i do alot of web stuff with python, i perfer using pycurl you can get it here
it is very simple to post data and login with curl, i've used it accross many languages such as PHP, python, and C++, hope this helps

You can use urllib this is a good example

transferring real time data from a website in python

I am programming in Python.
I would like to extract real time data from a webpage without refreshing it:
http://www.fxstreet.com/rates-charts/currency-rates/
I think the real time data webpage is written in AJAX but I am not quite sure..
I thought about opening an internet browser with the program but I do not really know/like this way... Is there an other way to do it?
I would like to fill a dictionnary in my program (or even a SQL database) with the latest numbers each second.
please help me in python, thanks!

To get the data, you'll need to look through the javascript and HTML source to find what URL it's hitting to get the data it's displaying. Then, you can call that URL with urllib or your favorite python library and parse it
Also, it may be easier if you use a plugin like Firebug that lets you watch the AJAX requests.

Scraping Ajax - Using python

I'm trying to scrap a page in youtube with python which has lot of ajax in it
I've to call the java script each time to get the info. But i'm not really sure how to go about it. I'm using the urllib2 module to open URLs. Any help would be appreciated.

Youtube (and everything else Google makes) have EXTENSIVE APIs already in place for giving you access to just about any and all data you could possibly want.
Take a look at The Youtube Data API for more information.
I use urllib to make the API requests and ElementTree to parse the returned XML.

Main problem is, you're violating the TOS (terms of service) for the youtube site. Youtube engineers and lawyers will do their professional best to track you down and make an example of you if you persist. If you're happy with that prospect, then, on you head be it -- technically, your best bet are python-spidermonkey and selenium. I wanted to put the technical hints on record in case anybody in the future has needs like the ones your question's title indicates, without the legal issues you clearly have if you continue in this particular endeavor.

Here is how I would do it: Install Firebug on Firefox, then turn the NET on in firebug and click on the desired link on YouTube. Now see what happens and what pages are requested. Find the one that are responsible for the AJAX part of page. Now you can use urllib or Mechanize to fetch the link. If you CAN pull the same content this way, then you have what you are looking for, then just parse the content. If you CAN'T pull the content this way, then that would suggest that the requested page might be looking at user login credentials, sessions info or other header fields such as HTTP_REFERER ... etc. Then you might want to look at something more extensive like the scrapy ... etc. I would suggest that you always follow the simple path first. Good luck and happy "responsibly" scraping! :)

As suggested, you should use the YouTube API to access the data made available legitimately.
Regarding the general question of scraping AJAX, you might want to consider the scrapy framework. It provides extensive support for crawling and scraping web sites and uses python-spidermonkey under the hood to access javascript links.

You could sniff the network traffic with something like Wireshark then replay the HTTP calls via a scraping framework that is robust enough to deal with AJAX, such as scraPY.