"Invalid header field" errors when converting exports from Chrome about har-to-k6

[sniku]

We have discovered (again) that pseudo-headers should be skipped when converting HAR files. https://tools.ietf.org/html/rfc7540

All headers that start with : should not appear in the output script. Sample HAR attached.

{
  "log": {
    "version": "1.2",
    "creator": {
      "name": "WebInspector",
      "version": "537.36"
    },
    "pages": [
      {
        "startedDateTime": "2020-02-07T17:24:34.196Z",
        "id": "page_2",
        "title": "https://qa.teklager.se/en/products/router-components/pc-engines-apu-enclosure",
        "pageTimings": {
          "onContentLoad": 883.0719999969006,
          "onLoad": 1526.7620000522584
        }
      }
    ],
    "entries": [
      {
        "startedDateTime": "2020-02-07T17:24:34.608Z",
        "time": 52.83600010443479,
        "request": {
          "method": "GET",
          "url": "https://fonts.googleapis.com/css?family=Montserrat:400,700",
          "httpVersion": "http/2.0+quic/46",
          "headers": [
            {
              "name": ":method",
              "value": "GET"
            },
            {
              "name": ":authority",
              "value": "fonts.googleapis.com"
            },
            {
              "name": ":scheme",
              "value": "https"
            },
            {
              "name": ":path",
              "value": "/css?family=Montserrat:400,700"
            },
            {
              "name": "pragma",
              "value": "no-cache"
            },
            {
              "name": "cache-control",
              "value": "no-cache"
            },
            {
              "name": "user-agent",
              "value": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36"
            },
            {
              "name": "dnt",
              "value": "1"
            },
            {
              "name": "accept",
              "value": "text/css,*/*;q=0.1"
            },
            {
              "name": "sec-fetch-site",
              "value": "cross-site"
            },
            {
              "name": "sec-fetch-mode",
              "value": "no-cors"
            },
            {
              "name": "referer",
              "value": "https://qa.teklager.se/en/products/router-components/pc-engines-apu-enclosure"
            },
            {
              "name": "accept-encoding",
              "value": "gzip, deflate, br"
            },
            {
              "name": "accept-language",
              "value": "en-US,en;q=0.9,sv-SE;q=0.8,sv;q=0.7,pl-PL;q=0.6,pl;q=0.5"
            }
          ],
          "queryString": [
            {
              "name": "family",
              "value": "Montserrat:400,700"
            }
          ],
          "cookies": [],
          "headersSize": -1,
          "bodySize": 0
        },
        "response": {
          "status": 200,
          "statusText": "",
          "httpVersion": "http/2.0+quic/46",
          "headers": [
            {
              "name": "status",
              "value": "200"
            },
            {
              "name": "content-type",
              "value": "text/css; charset=utf-8"
            },
            {
              "name": "access-control-allow-origin",
              "value": "*"
            },
            {
              "name": "timing-allow-origin",
              "value": "*"
            },
            {
              "name": "link",
              "value": "<https://fonts.gstatic.com>; rel=preconnect; crossorigin"
            },
            {
              "name": "strict-transport-security",
              "value": "max-age=31536000"
            },
            {
              "name": "expires",
              "value": "Fri, 07 Feb 2020 17:23:48 GMT"
            },
            {
              "name": "date",
              "value": "Fri, 07 Feb 2020 17:23:48 GMT"
            },
            {
              "name": "cache-control",
              "value": "private, max-age=86400, stale-while-revalidate=604800"
            },
            {
              "name": "last-modified",
              "value": "Fri, 07 Feb 2020 17:23:48 GMT"
            },
            {
              "name": "content-encoding",
              "value": "br"
            },
            {
              "name": "server",
              "value": "ESF"
            },
            {
              "name": "x-xss-protection",
              "value": "0"
            },
            {
              "name": "x-frame-options",
              "value": "SAMEORIGIN"
            },
            {
              "name": "alt-svc",
              "value": "quic=\":443\"; ma=2592000; v=\"46,43\",h3-Q050=\":443\"; ma=2592000,h3-Q049=\":443\"; ma=2592000,h3-Q048=\":443\"; ma=2592000,h3-Q046=\":443\"; ma=2592000,h3-Q043=\":443\"; ma=2592000"
            }
          ],
          "cookies": [],
          "content": {
            "size": 3778,
            "mimeType": "text/css",
            "text": "/* cyrillic-ext */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 400;\n  src: local('Montserrat Regular'), local('Montserrat-Regular'), url(https://fonts.gstatic.com/s/montserrat/v14/JTUSjIg1_i6t8kCHKm459WRhyzbi.woff2) format('woff2');\n  unicode-range: U+0460-052F, U+1C80-1C88, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;\n}\n/* cyrillic */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 400;\n  src: local('Montserrat Regular'), local('Montserrat-Regular'), url(https://fonts.gstatic.com/s/montserrat/v14/JTUSjIg1_i6t8kCHKm459W1hyzbi.woff2) format('woff2');\n  unicode-range: U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;\n}\n/* vietnamese */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 400;\n  src: local('Montserrat Regular'), local('Montserrat-Regular'), url(https://fonts.gstatic.com/s/montserrat/v14/JTUSjIg1_i6t8kCHKm459WZhyzbi.woff2) format('woff2');\n  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+1EA0-1EF9, U+20AB;\n}\n/* latin-ext */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 400;\n  src: local('Montserrat Regular'), local('Montserrat-Regular'), url(https://fonts.gstatic.com/s/montserrat/v14/JTUSjIg1_i6t8kCHKm459Wdhyzbi.woff2) format('woff2');\n  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;\n}\n/* latin */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 400;\n  src: local('Montserrat Regular'), local('Montserrat-Regular'), url(https://fonts.gstatic.com/s/montserrat/v14/JTUSjIg1_i6t8kCHKm459Wlhyw.woff2) format('woff2');\n  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;\n}\n/* cyrillic-ext */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 700;\n  src: local('Montserrat Bold'), local('Montserrat-Bold'), url(https://fonts.gstatic.com/s/montserrat/v14/JTURjIg1_i6t8kCHKm45_dJE3gTD_u50.woff2) format('woff2');\n  unicode-range: U+0460-052F, U+1C80-1C88, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;\n}\n/* cyrillic */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 700;\n  src: local('Montserrat Bold'), local('Montserrat-Bold'), url(https://fonts.gstatic.com/s/montserrat/v14/JTURjIg1_i6t8kCHKm45_dJE3g3D_u50.woff2) format('woff2');\n  unicode-range: U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;\n}\n/* vietnamese */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 700;\n  src: local('Montserrat Bold'), local('Montserrat-Bold'), url(https://fonts.gstatic.com/s/montserrat/v14/JTURjIg1_i6t8kCHKm45_dJE3gbD_u50.woff2) format('woff2');\n  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+1EA0-1EF9, U+20AB;\n}\n/* latin-ext */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 700;\n  src: local('Montserrat Bold'), local('Montserrat-Bold'), url(https://fonts.gstatic.com/s/montserrat/v14/JTURjIg1_i6t8kCHKm45_dJE3gfD_u50.woff2) format('woff2');\n  unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;\n}\n/* latin */\n@font-face {\n  font-family: 'Montserrat';\n  font-style: normal;\n  font-weight: 700;\n  src: local('Montserrat Bold'), local('Montserrat-Bold'), url(https://fonts.gstatic.com/s/montserrat/v14/JTURjIg1_i6t8kCHKm45_dJE3gnD_g.woff2) format('woff2');\n  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;\n}\n"
          },
          "redirectURL": "",
          "headersSize": -1,
          "bodySize": -1,
          "_transferSize": 919
        },
        "cache": {},
        "timings": {
          "blocked": 21.982000092975795,
          "dns": 0,
          "ssl": -1,
          "connect": 0,
          "send": 0.646,
          "wait": 27.486000006735324,
          "receive": 2.722000004723668,
          "_blocked_queueing": 21.982000092975795
        },
        "serverIPAddress": "216.58.207.234",
        "_initiator": {
          "type": "parser",
          "url": "https://qa.teklager.se/en/products/router-components/pc-engines-apu-enclosure",
          "lineNumber": 55
        },
        "_priority": "VeryHigh",
        "_resourceType": "stylesheet",
        "pageref": "page_2"
      }
    ]
  }
}

[sniku]

In addition, content-length and cookies should be ignored for consistency with the k6 convert command. https://github.com/loadimpact/k6/blob/master/converter/har/converter.go#L393