http_request_host.cpp

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#ifdef USE_HOST
 
#define USE_HTTP_REQUEST_HOST_H
#define CPPHTTPLIB_NO_EXCEPTIONS
#include "httplib.h"
#include "http_request_host.h"
 
#include <cstring>
 
#include <regex>
#include "esphome/components/network/util.h"
#include "esphome/components/watchdog/watchdog.h"
 
#include "esphome/core/application.h"
#include "esphome/core/log.h"
 
namespace esphome::http_request {
 
ESPHOME_LOG_TAG(TAG, "http_request");
 
std::shared_ptr<HttpContainer> HttpRequestHost::perform(const char *url, const char *method, const std::string &body,
                                                        const std::vector<Header> &request_headers,
                                                        const std::vector<std::string> &lower_case_collect_headers,
                                                        uint32_t) {
  if (!network::is_connected()) {
    this->status_momentary_error(1000);
    ESP_LOGW(TAG, "HTTP Request failed; Not connected to network");
    return nullptr;
  }
 
  std::regex url_regex(R"(^(([^:\/?#]+):)?(//([^\/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?)", std::regex::extended);
  std::cmatch url_match_result;
 
  if (!std::regex_match(url, url_match_result, url_regex) || url_match_result.length() < 7) {
    ESP_LOGE(TAG, "HTTP Request failed; Malformed URL: %s", url);
    return nullptr;
  }
  auto host = url_match_result[4].str();
  auto scheme_host = url_match_result[1].str() + url_match_result[3].str();
  auto path = url_match_result[5].str() + url_match_result[6].str();
  if (path.empty())
    path = "/";
 
  std::shared_ptr<HttpContainerHost> container = std::make_shared<HttpContainerHost>();
  container->set_parent(this);
 
  const uint32_t start = millis();
 
  watchdog::WatchdogManager wdm(this->get_watchdog_timeout());
 
  httplib::Headers h_headers;
  h_headers.emplace("Host", host.c_str());
  h_headers.emplace("User-Agent", this->useragent_);
  for (const auto &[name, value] : request_headers) {
    h_headers.emplace(name, value);
  }
  httplib::Client client(scheme_host);
  if (!client.is_valid()) {
    ESP_LOGE(TAG, "HTTP Request failed; Invalid URL: %s", url);
    return nullptr;
  }
  client.set_follow_location(this->follow_redirects_);
#ifdef CPPHTTPLIB_OPENSSL_SUPPORT
  if (this->ca_path_ != nullptr)
    client.set_ca_cert_path(this->ca_path_);
#endif
 
  httplib::Result result;
  if (strcmp(method, "GET") == 0) {
    result = client.Get(path, h_headers, [&](const char *data, size_t data_length) {
      ESP_LOGV(TAG, "Got data length: %zu", data_length);
      container->response_body_.insert(container->response_body_.end(), (const uint8_t *) data,
                                       (const uint8_t *) data + data_length);
      return true;
    });
  } else if (strcmp(method, "HEAD") == 0) {
    result = client.Head(path, h_headers);
  } else if (strcmp(method, "PUT") == 0) {
    result = client.Put(path, h_headers, body, "");
    if (result) {
      auto data = std::vector<uint8_t>(result->body.begin(), result->body.end());
      container->response_body_.insert(container->response_body_.end(), data.begin(), data.end());
    }
  } else if (strcmp(method, "PATCH") == 0) {
    result = client.Patch(path, h_headers, body, "");
    if (result) {
      auto data = std::vector<uint8_t>(result->body.begin(), result->body.end());
      container->response_body_.insert(container->response_body_.end(), data.begin(), data.end());
    }
  } else if (strcmp(method, "POST") == 0) {
    result = client.Post(path, h_headers, body, "");
    if (result) {
      auto data = std::vector<uint8_t>(result->body.begin(), result->body.end());
      container->response_body_.insert(container->response_body_.end(), data.begin(), data.end());
    }
  } else {
    ESP_LOGW(TAG, "HTTP Request failed - unsupported method %s; URL: %s", method, url);
    container->end();
    return nullptr;
  }
  App.feed_wdt();
  if (!result) {
    ESP_LOGW(TAG, "HTTP Request failed; URL: %s, error code: %u", url, (unsigned) result.error());
    container->end();
    this->status_momentary_error(1000);
    return nullptr;
  }
  App.feed_wdt();
  auto response = *result;
  container->status_code = response.status;
  if (!is_success(response.status)) {
    ESP_LOGE(TAG, "HTTP Request failed; URL: %s; Code: %d", url, response.status);
    this->status_momentary_error(1000);
    // Still return the container, so it can be used to get the status code and error message
  }
 
  container->content_length = container->response_body_.size();
  for (const auto &header : response.headers) {
    ESP_LOGD(TAG, "Header: %s: %s", header.first.c_str(), header.second.c_str());
    auto lower_name = str_lower_case(header.first);  // NOLINT
    if (should_collect_header(lower_case_collect_headers, lower_name)) {
      container->response_headers_.push_back({lower_name, header.second});
    }
  }
  container->duration_ms = millis() - start;
  return container;
}
 
int HttpContainerHost::read(uint8_t *buf, size_t max_len) {
  auto bytes_remaining = this->response_body_.size() - this->bytes_read_;
  auto read_len = std::min(max_len, bytes_remaining);
  memcpy(buf, this->response_body_.data() + this->bytes_read_, read_len);
  this->bytes_read_ += read_len;
  return read_len;
}
 
void HttpContainerHost::end() {
  watchdog::WatchdogManager wdm(this->parent_->get_watchdog_timeout());
  this->response_body_ = std::vector<uint8_t>();
  this->bytes_read_ = 0;
}
 
}  // namespace esphome::http_request
 
#endif  // USE_HOST