# US 12,003,532 B2 · Traffic-shaping HTTP proxy for denial-of-service protection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,532 B2 - Document ID: US12003532B2 - Status: Granted - Kind: B2 - Application number: 18/465,028 - Filed: 2023-09-11 - Published: 2023-12-28 - Granted: 2024-06-04 - Earliest claimed: 2021-05-27 - Assignees: Pantheon Systems, Inc. - Applicants: Pantheon Systems, Inc. - Inventors: David Timothy Strauss - Web page: https://patentgrep.com/patent/US12003532B2 ## CPC - H04L 63/0281: {Proxies} - H04L 63/1458: {Denial of Service} - H04L 47/562: {Attaching a time tag to queues} - H04L 47/622: {Queue service order} - H04L 47/70: Admission control; Resource allocation - H04L 47/724: at intermediate nodes, e.g. resource reservation protocol [RSVP] - H04L 63/1425: {Traffic logging, e.g. anomaly detection} - H04L 47/826: {Involving periods of time} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract In accordance with some aspects of the present disclosure, an apparatus is disclosed. In some embodiments, the apparatus includes a processor and a memory. In some embodiments, the memory includes programmed instructions that, when executed by the processor, cause the apparatus to receive a request from a client; determine family of metrics; schedule the request based on the family of metrics; and in response to satisfying one or more scheduling criteria, send the request to a backend server. ## Claims ### Claim 1 An apparatus comprising a processor and a memory, wherein the memory includes programmed instructions that, when executed by the processor, cause the apparatus to: receive a request from a client; determine a family of metrics, wherein the family of metrics includes numerically scored measures of backend responsiveness; schedule the request based on the family of metrics; and in response to satisfying one or more scheduling criteria, send the request to a backend server, wherein the family of metrics includes a sum of one or more backend times, wherein each backend time is associated with a respective one of one or more other requests, and wherein more recent backend times are weighted more heavily than less recent backend times. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the family of metrics includes a cumulative backend utilization time. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the family of metrics includes a cumulative backend queue time. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the sum values more recent backend times more substantially than less recent backend times. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the memory includes programmed instructions that, when executed by the processor, cause the apparatus to: receive a response from the backend server; and update the family of metrics at least based on a backend time of the request. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the memory includes programmed instructions that, when executed by the processor, cause the apparatus to: calculate the backend time using a time value received from the backend server as part of the response. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein scheduling includes assigning a delay, and wherein satisfying one or more scheduling criteria includes the delay elapsing. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein satisfying one or more scheduling criteria includes a rescheduling counter meeting or exceeding a rescheduling counter threshold when the delay elapses. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein satisfying one or more scheduling criteria includes determining that a buffer is out of space between an assigned location of the buffer and an end of the buffer. ### Claim 10 A non-transitory computer readable storage medium comprising instructions stored thereon that, when executed by a processor, cause the processor to: receive a request from a client; determine a family of metrics, wherein the family of metrics includes numerically scored measures of backend responsiveness; schedule the request based on the family of metrics; and in response to satisfying one or more scheduling criteria, send the request to a backend server, wherein the family of metrics includes a sum of one or more backend times, wherein each backend time is associated with a respective one of one or more other requests, and wherein more recent backend times are weighted more heavily than less recent backend times. ### Claim 11 (depends on 10) The medium of claim 10, wherein the family of metrics includes a cumulative backend utilization time. ### Claim 12 (depends on 10) The medium of claim 10, wherein the family of metrics includes a cumulative backend queue time. ### Claim 13 (depends on 10) The medium of claim 10, wherein the sum values more recent backend times more substantially than less recent backend times. ### Claim 14 (depends on 10) The medium of claim 10, wherein the memory includes programmed instructions that, when executed by the processor, cause the apparatus to: receive a response from the backend server; and update the family of metrics at least based on a backend time of the request. ### Claim 15 (depends on 14) The medium of claim 14, further comprising instructions stored thereon that, when executed by the processor, cause the processor to: calculate the backend time using a time value received from the backend server as part of the response. ### Claim 16 A computer-implemented method comprising: receiving a request from a client; determining a family of metrics, wherein the family of metrics includes numerically scored measures of backend responsiveness; scheduling the request based on the family of metrics; and in response to satisfying one or more scheduling criteria, sending the request to a backend server, wherein the family of metrics includes a sum of one or more backend times, wherein each backend time is associated with a respective one of one or more other requests, and wherein more recent backend times are weighted more heavily than less recent backend times. ### Claim 17 (depends on 16) The method of claim 16, wherein the family of metrics includes a cumulative backend utilization time. ### Claim 18 (depends on 16) The method of claim 16, wherein the family of metrics includes a cumulative backend queue time. ### Claim 19 (depends on 16) The method of claim 16, wherein the sum values more recent backend times more substantially than less recent backend times. ### Claim 20 (depends on 16) The method of claim 16, further comprising: receiving a response from the backend server; and updating the family of metrics at least based on a backend time of the request.