Common errors and solutions in Python HTTP requests

1. Error 404: Resource Not Found

Error 404 is one of the most common Http errors and indicates that the server cannot find the requested resource. This may be due to the following reasons:

• The requested URL is incorrect.
• The requested resource has been deleted or moved.
• Server configuration error.

To resolve this error, you need to check that the requested URL is correct and make sure that the requested resource still exists. If the resource has been deleted or moved, you need to update your code to request the correct URL. If the server is misconfigured, you will need to contact the server administrator to resolve the issue.

try:
response = requests.get("https://example.com/non-existent-page")
response.raise_for_status()
except requests.exceptions.HTTPError as e:
if e.response.status_code == 404:
print("The requested resource could not be found.")

2. Error 403: Forbidden

Error 403 means that the server denies access to the requested resource. This may be due to the following reasons:

• You do not have permission to access this resource.
• Server configuration error.

To resolve this error, you need to ensure that you have permission to access the resource. You can also contact the server administrator to check if the server configuration is incorrect.

try:
response = requests.get("https://example.com/private-page")
response.raise_for_status()
except requests.exceptions.HTTPError as e:
if e.response.status_code == 403:
print("You do not have permission to access the requested resource.")

3. Error 500: Internal Server Error

Error 500 means that the server encountered an unexpected error while processing the request. This can be caused by a number of reasons, such as:

• Server code error.
• Insufficient server resources.
• Server configuration error.

To resolve this error, you need to contact your server administrator to find out the cause of the error and resolve the issue.

try:
response = requests.get("https://example.com/buggy-page")
response.raise_for_status()
except requests.exceptions.HTTPError as e:
if e.response.status_code == 500:
print("The server encountered an unexpected error while processing your request.")

4. Error 502: Bad gateway

Error 502 indicates that the server received an invalid response from the upstream server when acting as a gateway or proxy. This may be due to the following reasons:

• The upstream server encountered a problem.
• NetworkConnection problem.

To resolve this error, you need to check whether the upstream server is running normally and make sure there are no problems with the network connection.

try:
response = requests.get("https://example.com/proxied-page")
response.raise_for_status()
except requests.exceptions.HTTPError as e:
if e.response.status_code == 502:
print("The server received an invalid response from the upstream server.")

5. Error 503: Service Unavailable

Error 503 means that the server is temporarily unable to process the request. This may be due to the following reasons:

• The server is overloaded.
• The server is under maintenance.

To resolve this error, you need to try again later. You can also contact the server administrator to find out when the server will be up and running again.

try:
response = requests.get("https://example.com/overloaded-page")
response.raise_for_status()
except requests.exceptions.HTTPError as e:
if e.response.status_code == 503:
print("The server is temporarily unable to handle your request.")

6. Timeout error

Timeout error means that the server did not respond to the request within the specified time. This may be due to the following reasons:

• Network connection problem.
• The server is overloaded.
• Server code error.

To resolve this error, you need to check whether the network connection is normal and make sure the server is not overloaded. You can also contact the server administrator to find out the cause of the error and resolve the issue.

try:
response = requests.get("https://example.com/slow-page", timeout=5)
response.raise_for_status()
except requests.exceptions.Timeout as e:
print("The server did not respond within the specified timeout.")

7. connection error

Connection error means that the connection to the server cannot be established. This may be due to the following reasons:

• Network connection problem.
• The server address is incorrect.
• The server port is incorrect.

To resolve this error, you need to check whether the network connection is normal and make sure the server address and port are correct.

try:
response = requests.get("https://example.com:8081")
response.raise_for_status()
except requests.exceptions.ConnectionError as e:
print("Could not connect to the server.")

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