jiachengzhang1/http-protocal

HTTP in C

Build

Make sure gcc is installed.

1. Unzip the project unzip path/to/http_get.zip -d http_get.
2. Change into the project directory cd path/to/http_get/.
3. Use make command to compile the code. Run make or make all. Make sure Makefile is in the directory.
4. Executable http_get should be generated along with object files.
5. make clean to delete compiled files and the executable.

Run

1. ./http_get --url <Full URL> Make HTTP request to URL and print the response to the console

• <Full URL> Required. Define the URL to make requests. Prefix http:// is required.
• For example, ./http_get --url http://assignment.jiachengzhang.workers.dev/links

2. ./http_get --help Print help page.

3. ./http_get --profile <Number of Requests> <Full URL> Measure website's performance.

• <Number of Request> Required. Make the given number of requests to the server.
• <Full URL> Optional. Define the URL to make requests. Prefix http:// is required. It is set as website built from "General Assignment" (http://assignment.jiachengzhang.workers.dev) if there's not a provided URL.
• For example, ./http_get --profile 10 makes 10 requests to http://assignment.jiachengzhang.workers.dev by default, then prints out the performance. ./http_get --profile 10 http://static-links-page.signalnerve.workers.dev makes 10 requests to http://static-links-page.signalnerve.workers.dev, then prints out the performance.

Profile

Perform Testing

Once the program is compiled via make, it's time for performance measurement. Run bash run_test.sh <Number of Requests> <Site1's URL> <Site2's URL> to perform comparison between two sites. <Number of Requests>, <Site1's URL> and <Site2's URL> are optional. Run bash run_test.sh to profile assignment.jiachengzhang.worker site and static-links-page site (Sites Comparison 1 with only 100 requests). Results can be found in profile.txt.

Sites Comparison 1

Result

I choose to compare my site built for general assignment assignment.jiachengzhang.worker site and the site that my site fetches static page from static-links-page site. The results are following,

Conclusion

I think this is a representaive comparison. assignment.jiachengzhang.worker site requires extra time to fetch and wait the static page responsed by the static-links-page site, then inject more content. Because both of the sites are hosted by Cloudflare, I assume that two servers are close to each other. The resulted statistics demostrated that assignment.jiachengzhang.worker site takes more time to send back responses, and it also has larger response sizes compared to static-links-page site among 1000 requests.

Sites Comparison 2

Result

Here's the comparison between assignment.jiachengzhang.worker site and baidu, the most popular search engine in China, results are following,

Conclusion

Becuase the responsed web page of Baidu has JavaScript and more content, its response size is larger than assignment.jiachengzhang.worker site. In addition, Baidu's smallest response size is the same as largest response size while assignment.jiachengzhang.worker site has different smallest and largest response size, it may be because assignment.jiachengzhang.worker site's content is random while Baidu's not. Lastly, Baidu's response has higher latency than assignment.jiachengzhang.worker site. One reason could be my location is closer to Cloudflare's server than to Baidu's which is located in China; it could also because Baidu's server is much busier than assignment.jiachengzhang.worker site due to the fact that it needs to handle large numer of requests every seconds.

Sites Comparison 3

Result

The following is the comparison between assignment.jiachengzhang.worker site and New York University's Official Website,

Conclusion

Among 50 requests to both websites, New York University's Official Website has 3 times higher latency on average than assignment.jiachengzhang.worker site's, and has response that's 3 times larger than assignment.jiachengzhang.worker site in term of the largest response.